Nail Prime Acid Free Primer. Perfect Clr Sculpt Pwdr. Radical SolarNail Sculpt Liq. Retention Liquid. Retention Sculpt Liq. Scrubfresh. Shellac (All Colors) Solar Nail Liquid. MATERIAL SAFETY DATA SHEET Consumer Product Date Issued: 08/24/2012 MSDS No: CND-N-037 Speedey SKIN: Mild skin irritant SKIN ABSORPTION: NA = Not Applicable INGESTION: May cause gastro-intestinal irritation, nausea, vomiting and diarrheaMonomer Liquid. OZ | Item NOLIFT3. $6.99 - $19.79. 199. Select Size: 1 oz. (California Only) 4 oz. This item earns at least 70 points! See details.ASP Bonding Acrylic Nail Liquid is an adhesive acrylic liquid that does not require a primer. It creates beautiful crystal clear acrylic nails when used with ASP Bonding Powder. ASP Bonding Acrylic Nail Liquid is also available to ship to California. If the product is being shipped to California please select the Size labeled California Only. Energy is absorbed. Energy remains stationary. Energy becomes transformed. Energy is absorbed. A student writes the following statements about the relationship between mass defect and nuclear binding energy. 1. When an isotope's protons and neutrons come together to form a nuclide, a small amount of mass is converted to energy. 2. Here Are The Top 10 Resources For Acrylic Nails Liquid Powder Based On Our ResearchASP Bonding Acrylic Nail Liquid is an adhesive acrylic liquid that does not require a primer. It creates beautiful crystal clear acrylic nails when used with ASP Bonding Powder. ASP Bonding Acrylic Nail Liquid is also available to ship to California. If the product is being shipped to California please select the Size labeled California Only.SDS. A material safety data sheet (MSDS) is a form with data regarding the properties of a particular substance. An important component of product stewardship and workplace safety, it is intended to provide workers and emergency personnel with procedures for handling or working with that substance in a safe manner, and includes information such ... MSDS (Material Safety Data Sheets) Forms that provide safety guidelines for use of professional products; MSDS are required by state and federal law to be distributed by all manufacturers and distributors under the OSHA Hazard Communication Standard 29 CFR 1910.1200; nail technicians should keep MSDS easily accessible for each product they use ... Mia Secret Store Liquid Monomer Professional Acrylic Nail System, 32 oz Liquid, 946 ml: Advanced, blended, EMA, liquid monomer with a non-yellowing formula for cleaner-looking nails; Provides flexibility, adhesion and absorption when combined with Mia Secret Acrylic Powders; Professional acrylic nail system prevents discolorationWestern blotting is an important technique used in cell and molecular biology. By using a western blot, researchers are able to identify specific proteins from a complex mixture of proteins extracted from cells. The technique uses three elements to accomplish this task: (1) separation by size, (2) t … However, an analysis of 31 products sold between 1975 and 1981 revealed that this monomer was present in 9 of them. Patch testing with nail enamel may be performed by the covered or open method. However, open patch testing is recommended for nail enamel removers and cuticle removers due to their high volatile solvent concentrations.Energy is absorbed. Energy remains stationary. Energy becomes transformed. Energy is absorbed. A student writes the following statements about the relationship between mass defect and nuclear binding energy. 1. When an isotope's protons and neutrons come together to form a nuclide, a small amount of mass is converted to energy. 2. The drying time of this Monomer Acrylic Nail Liquid is 3-5 minutes. Best time to dry. Enough time that allows you to make nail extension,overlays or sculpting with Acrylic Powder(not included)before it gets hard. This Acrylic liquid monomer won’t dry too slowly to damage your elaborate nail art while waiting . Great Compatibility . Just Ask Sally Sally Favorites Trend Lookbook Pre-Fall Trends 2020 Pre-Fall Nail Care ... Monomer Liquid. $6.99 - $19.79 2 Size Options In-store Pickup 199. 30 Results Sort By: ASP Clear Bonding Acrylic Powder $20.89 - $32.99 2 Size Options In-store Pickup 119 No Lift Nails Monomer Liquid $6.99 - $19.79 2 Size Options In-store Pickup 199 No Lift Nails Primer $15.39 In-store Pickup 133 Add to Bag Beauty Secrets Acrylic Powder $12.99 4 Color Options In-store Pickup 332 Choose ColorDiscover short videos related to best sallys monomer on TikTok. Watch popular content from the following creators: Slayedbyseyy(@seylahh), Gianna Marie(@ggmarieee), Sophia 🤍(@sophiaxo77), Love.krista💋(@love.kristamauro), Colleen Brown(@colleenbrownnnn), Colleen Brown(@colleenbrownnnn), Jasmine 💕(@juicyjasofficial), Jennifer Godina ... Apply one coat of miracle gel top coat to lock in your mani for upto 8 days.No UV light needed. Also available in matte.Once the top coat layer is dry, moisturize your nails with our favorite vitamin E cuticle oil. Apply one layer of cuticle oil across each cuticle.For easy removal use Sally Hansen's extra strength nail polish removerShop acrylic powder and acrylic liquid at sally beauty. Buy now, pay later with Klarna. Rewards; ... Monomer (3) Nail Dehydrators (3) Nail Primers (2) Base Coats (1 ...Discover short videos related to best sallys monomer on TikTok. Watch popular content from the following creators: Slayedbyseyy(@seylahh), Gianna Marie(@ggmarieee), Sophia 🤍(@sophiaxo77), Love.krista💋(@love.kristamauro), Colleen Brown(@colleenbrownnnn), Colleen Brown(@colleenbrownnnn), Jasmine 💕(@juicyjasofficial), Jennifer Godina(@jennyxo_x), Kk kray 👑(@kkrystallynn), Diana Lynn ...Make a good deal when shopping your New York Organic Infused Nail Treatment Strengthening Bamboo Cream. Klarna's easy Nail Strengtheners price comparison tools will help you find the lowest price!After hours researching and comparing all models on the market, we find out the Best Nail Monomer of 2023. Check our ranking below. 2,367 Reviews Scanned. Sale Rank No. #1. 8 oz Mia Secret Liquid Monomer - Professional Acrylic Nail Liquid for Acrylic Powder - EMA monomer - Nail Monomer liquid - ema monomer acrylic nail liquid. EMA FORMULA ...Gift Box / Set, Long-lasting. Compare prices from $15.99 to $103.99. Popularity . 2 . in . Gift Boxes & Sets Make a good deal when shopping your Gelish LED/UV Soak Off #1110910 Party. Klarna's easy Gel Polishess price comparison tools will help you find the lowest price!monomer, a molecule of any of a class of compounds, mostly organic, that can react with other molecules to form very large molecules, or polymers. The essential feature of a monomer is polyfunctionality, the capacity to form chemical bonds to at least two other monomer molecules. Bifunctional monomers can form only linear, chainlike polymers ...mia secret monomer sally'smatte black straight shower arm. steel frame bike ireland. by . intex camo river run i tube ...For professional nails and starting nail students, Mia Secret is the best brand for a cheap-priced professional product. They have unique and good quality nail products such as liquid monomer, acrylic nail powder, acrylic nail system, kits, nail art powder collection, builder gel. Nail Art products, topcoat & treatMake a good deal when shopping your Cuccio Colour Veneer Nail Polish Triple Pigmentation Soak Off Gel. Klarna's easy Nail Polishes price comparison tools will help you find the lowest price!Make a good deal when shopping your Rapid 5000817 16A 20° Galvanised Brad Nails. Klarna's easy False Nails price comparison tools will help you find the lowest price!Just Ask Sally Sally Favorites Trend Lookbook Pre-Fall Trends 2020 Pre-Fall Nail Care ... Monomer Liquid. $6.99 - $19.79 2 Size Options In-store Pickup 199.Sally Beauty. MINI Soak-Off Gel Nail Polish Tiger Blossom. In stock. $10.99 ... M. Pitsikalis, in Reference Module in Chemistry, Molecular Sciences and Chemical Engineering, 2013 Monomers. Monomers bearing electron-releasing groups are susceptible to cationic polymerization. 78, 79 These monomers can be classified in two main categories: (1) vinyl monomers, for which the reactive end group is a carbocation, and (2) heterocyclic monomers, bearing one or two heteroatoms ...ASP Bonding Acrylic Nail Liquid is an adhesive acrylic liquid that does not require a primer. It creates beautiful crystal clear acrylic nails when used with ASP Bonding Powder. ASP Bonding Acrylic Nail Liquid is also available to ship to California. If the product is being shipped to California please select the Size labeled California Only.Make a good deal when shopping your New York Organic Infused Nail Treatment Strengthening Bamboo Cream. Klarna's easy Nail Strengtheners price comparison tools will help you find the lowest price! In case of an Environmental, Health, Safety or Quality emergency involving our product, please call 1-800-Ashland (1-800-274-5263 toll-free) or 001-859-963-4704(caller paid). Hair Extensions. Textured and Curly Hair Care. Try On Virtual Hair Color. New & Now. The Trend Report. DIY University. Get 15% off your next online order when you sign up for text messages. Find Your Nearest Store. Sally Beauty Holdings, Inc. Monomer. In chemistry, a monomer ( / ˈmɒnəmər / MON-ə-mər; mono-, "one" + -mer, "part") is a molecule that can react together with other monomer molecules to form a larger polymer chain or three-dimensional network in a process called polymerization. [1] [2] [3] Monomer molecule: A molecule which can undergo polymerization, thereby ... We would like to show you a description here but the site won’t allow us.IntiMD TRUE-EMA Liquid Monomer 4 oz, Advanced GlamourShield Acrylic Formula, Nail IntiMD TRUE-EMA Liquid Monomer 4 oz, Advanced GlamourShield Acrylic Formula, Nail Hair Extensions. Textured and Curly Hair Care. Try On Virtual Hair Color. New & Now. The Trend Report. DIY University. Get 15% off your next online order when you sign up for text messages. Find Your Nearest Store. Sally Beauty Holdings, Inc. 8 oz Mia Secret Liquid Monomer - Professional Acrylic Nail Liquid for Acrylic Powder - EMA monomer - Nail Monomer liquid - ema monomer acrylic nail liquid 4.6 out of 5 stars 30,717 8 offers from $20.80 More info Reviews Monomer Clear (Transparent Monomer) 100 ml. Acrylic fluid based on ethylmethalylate. Does not contain methylmethalylate. The content of a significant percentage of plasticizers guarantees the creation of thinner, more elastic and durable nails. Does not harm the nail plate. Transparent monomer: * increases acrylic plasticity; Beauty Secrets. Medium Coarse Black Cushion Nail File. $1.09 - $32.99. 2 Quantity Options. In-store Pickup. 133. Medicool. Mani-Vac 2 Dust Capture System. $1,299.00. Star Nail. Four-Sided Soft White Polar Block. $14.29. 1 Quantity Options. In-store Pickup. 100. ASP. Economy 3-Way Buffer. $2.69.MATERIAL SAFETY DATA SHEET Page 2 of 8 CND-N-140 Prepared to OSHA, ACC, ANSI, NOHSC, WHMIS & 2001/58 EC Standards MSDS Revision: 1.6 MSDS Revision Date: 03/17/2010 About this item . 💝 MOROVAN PROFESSIONAL ACRYLIC NAIL KIT FOR BEGINNERS: This acrylic nail kit with everything comes in 3 colors acrylic powder, , 3 sizes acrylic nail brushes and other acrylic nail tools supplies, so you can create a protective layer to strengthen your own natural nails, long-lasting for 3-5 weeks.Make a good deal when shopping your Gelish Color of Petals Collection 2019 Soak-Off I. Klarna's easy Gel Polishess price comparison tools will help you find the lowest price! Acrylic Nail Liquid. 2 OZ | Item SBS-164434. $13.69. 162. This item earns at least 140 points! See details. In-Store Pickup. The drying time of this Monomer Acrylic Nail Liquid is 3-5 minutes. Best time to dry. Enough time that allows you to make nail extension,overlays or sculpting with Acrylic Powder(not included)before it gets hard. This Acrylic liquid monomer won’t dry too slowly to damage your elaborate nail art while waiting . Great Compatibility . Acrylic Nail Liquid. 2 OZ | Item SBS-164434. $13.69. 162. This item earns at least 140 points! See details. In-Store Pickup.For professional nails and starting nail students, Mia Secret is the best brand for a cheap-priced professional product. They have unique and good quality nail products such as liquid monomer, acrylic nail powder, acrylic nail system, kits, nail art powder collection, builder gel. Nail Art products, topcoat & treatGift Box / Set, Long-lasting. Compare prices from $15.99 to $103.99. Popularity . 2 . in . Gift Boxes & Sets Here Are The Top 10 Resources For Acrylic Nails Liquid Powder Based On Our ResearchMake a good deal when shopping your Cuccio Match Makers Set Quilty As Charged. Klarna's easy Gift Boxes & Sets price comparison tools will help you find the lowest price!M. Pitsikalis, in Reference Module in Chemistry, Molecular Sciences and Chemical Engineering, 2013 Monomers. Monomers bearing electron-releasing groups are susceptible to cationic polymerization. 78, 79 These monomers can be classified in two main categories: (1) vinyl monomers, for which the reactive end group is a carbocation, and (2) heterocyclic monomers, bearing one or two heteroatoms ...Highly unlikely, but will occur if large quantity of product comes in contact with an equally large quantity of monomer. 10.4 Conditions to Avoid: High heat 120 °F (48.8 °C) and proximity to monomers. (Large quantities only, e.g. > 1 gallon (3.785 liters)). 10.5 Incompatible Substances: Monomer. mia secret monomer sally'smatte black straight shower arm. steel frame bike ireland. by . intex camo river run i tube ...Acrylic powder is bubble-free, which strengthens and adds clarity to nails. Acrylic liquid contains optical enhancers which helps to prevent nail yellowing. Kit contains: 40 nail tips, 30 nail forms, mini nail file, glass dappen dish, small acrylic nail brush, and reusable case. Nail Lamp, UV Lamp, LED Lamp, 48. Compare prices from $23.99 to $61.99. Popularity . 7 . in MSDS (Material Safety Data Sheets) Forms that provide safety guidelines for use of professional products; MSDS are required by state and federal law to be distributed by all manufacturers and distributors under the OSHA Hazard Communication Standard 29 CFR 1910.1200; nail technicians should keep MSDS easily accessible for each product they use ... ASP Bonding Acrylic Nail Liquid is an adhesive acrylic liquid that does not require a primer. It creates beautiful crystal clear acrylic nails when used with ASP Bonding Powder. ASP Bonding Acrylic Nail Liquid is also available to ship to California. If the product is being shipped to California please select the Size labeled California Only. ASP Bonding Acrylic Nail Liquid is an adhesive acrylic liquid that does not require a primer. It creates beautiful crystal clear acrylic nails when used with ASP Bonding Powder. ASP Bonding Acrylic Nail Liquid is also available to ship to California. If the product is being shipped to California please select the Size labeled California Only. monomer, a molecule of any of a class of compounds, mostly organic, that can react with other molecules to form very large molecules, or polymers. The essential feature of a monomer is polyfunctionality, the capacity to form chemical bonds to at least two other monomer molecules. Bifunctional monomers can form only linear, chainlike polymers ...We would like to show you a description here but the site won’t allow us.Make a good deal when shopping your CND Shellac UV Gel Nail Polish. Klarna's easy Gel Polishess price comparison tools will help you find the lowest price!View the profiles of people named Sally Monomer. Join Facebook to connect with Sally Monomer and others you may know. Facebook gives people the power to... Just Ask Sally Sally Favorites Trend Lookbook Pre-Fall Trends 2020 Pre-Fall Nail Care ... Monomer Liquid. $6.99 - $19.79 2 Size Options In-store Pickup 199. SDS. Acetone. Airshield. Attract Primer. Attraction Crystal Clear Powder. Attraction Extreme Pink. Attraction Nail Liquid. Attraction Peach Blush Powder. Attraction Perfect Pink Powder. Make a good deal when shopping your L.A. COLORS Gel Nail Polish, Mademoiselle. Klarna's easy Gel Polishess price comparison tools will help you find the lowest price!monomer: [noun] a chemical compound that can undergo polymerization.Sally Beauty. Free 2 Hour Delivery on orders over $35. 15% off an online order when you sign up for text. See How. Text and Email Sign up; Rewards; Credit Card; App ... Make a good deal when shopping your Ardell Nail Addict Premium Press Nails Ice. Klarna's easy False Nails price comparison tools will help you find the lowest price!Make a good deal when shopping your New York Organic Infused Nail Treatment Strengthening Bamboo Cream. Klarna's easy Nail Strengtheners price comparison tools will help you find the lowest price! Nail Prime Acid Free Primer. Perfect Clr Sculpt Pwdr. Radical SolarNail Sculpt Liq. Retention Liquid. Retention Sculpt Liq. Scrubfresh. Shellac (All Colors) Solar Nail Liquid. ASP Bonding Acrylic Nail Liquid is an adhesive acrylic liquid that does not require a primer. It creates beautiful crystal clear acrylic nails when used with ASP Bonding Powder. ASP Bonding Acrylic Nail Liquid is also available to ship to California. If the product is being shipped to California please select the Size labeled California Only.Monomer Liquid. 4 OZ | Item SBS-717033. $19.79. 199. This item earns at least 200 points! See details. In-Store Pickup.Beauty Secrets. Medium Coarse Black Cushion Nail File. $1.09 - $32.99. 2 Quantity Options. In-store Pickup. 133. Medicool. Mani-Vac 2 Dust Capture System. $1,299.00.ASP Bonding Acrylic Nail Liquid is an adhesive acrylic liquid that does not require a primer. It creates beautiful crystal clear acrylic nails when used with ASP Bonding Powder. ASP Bonding Acrylic Nail Liquid is also available to ship to California. If the product is being shipped to California please select the Size labeled California Only. After hours researching and comparing all models on the market, we find out the Best Nail Monomer of 2023. Check our ranking below. 2,367 Reviews Scanned. Sale Rank No. #1. 8 oz Mia Secret Liquid Monomer - Professional Acrylic Nail Liquid for Acrylic Powder - EMA monomer - Nail Monomer liquid - ema monomer acrylic nail liquid. EMA FORMULA ... After hours researching and comparing all models on the market, we find out the Best Nail Monomer of 2023. Check our ranking below. 2,367 Reviews Scanned. Sale Rank No. #1. 8 oz Mia Secret Liquid Monomer - Professional Acrylic Nail Liquid for Acrylic Powder - EMA monomer - Nail Monomer liquid - ema monomer acrylic nail liquid. EMA FORMULA ... Hair Extensions. Textured and Curly Hair Care. Try On Virtual Hair Color. New & Now. The Trend Report. DIY University. Get 15% off your next online order when you sign up for text messages. Find Your Nearest Store. Sally Beauty Holdings, Inc.Sally Hansen Miracle Gel Merry and Bright Collection Gingerbread Man-icure - 0.5 fl oz. $7.49 ... Pour ASP Bonding Acrylic Nail Liquid into dappen dish. Immerse brush in the liquid, wipe the brush sides on the dappen dish; pick up a ball of Aspire Bonding Powder - begin sculpting. * LIQUID MONOMER & NAIL PREPS * MIA SECRET * SNS BASIC * TONY LY * VALENTINO * VALENTINO ACRYLIC COVER POWDER * YOUNG NAIL; DIPPING POWDER * DIPPING POWDER - CLEAR - P&W * DIP ALL ESSENTIALS * SNS dipping powder colors * OPI dipping powder colors * LDS dipping powder colors * Kiara sky dipping powder colors * Nugenesis dipping powder colors Sally Beauty. MINI Soak-Off Gel Nail Polish Tiger Blossom. In stock. $10.99 ...In case of an Environmental, Health, Safety or Quality emergency involving our product, please call 1-800-Ashland (1-800-274-5263 toll-free) or 001-859-963-4704(caller paid).Proteoglycan Monomers and Proteoglycan Aggregates. PG monomers are complex macromolecules composed of many GAGs covalently bonded to a core protein of varying length. Three dimensionally, the side chains attached to the core protein form the shape of a “bottle brush” (see Fig. 14-6). OPI Gel Color - Mylar Dreams 0.5 oz - #HPN04. $19.99. Beauty Plus Salon monomer. : A GUI library for writing native Haskell applications. Monomer is an easy to use, cross platform, GUI library for writing native Haskell applications. It provides a framework similar to the Elm Architecture, allowing the creation of GUIs using an extensible set of widgets with pure Haskell.
1. Nucleic acids include RNA and DNA. The monomers of these molecules are ____. 2. Phospholipid molecules in a membrane are arranged with their ______ on the exterior and their _____ on the interior. 3.A student measured the time required for a protein sample to be completely digested in the presence of an enzyme under different pH levels.. Mini chainsaw cordless 6 inch with 2 battery
Just Ask Sally Sally Favorites Trend Lookbook Pre-Fall Trends 2020 Pre-Fall Nail Care ... Monomer Liquid. $6.99 - $19.79 2 Size Options In-store Pickup 199.Just Ask Sally Sally Favorites Trend Lookbook Pre-Fall Trends 2020 Pre-Fall Nail Care ... Monomer Liquid. $6.99 - $19.79 2 Size Options In-store Pickup 199.M. Pitsikalis, in Reference Module in Chemistry, Molecular Sciences and Chemical Engineering, 2013 Monomers. Monomers bearing electron-releasing groups are susceptible to cationic polymerization. 78, 79 These monomers can be classified in two main categories: (1) vinyl monomers, for which the reactive end group is a carbocation, and (2) heterocyclic monomers, bearing one or two heteroatoms ... Nail Prime Acid Free Primer. Perfect Clr Sculpt Pwdr. Radical SolarNail Sculpt Liq. Retention Liquid. Retention Sculpt Liq. Scrubfresh. Shellac (All Colors) Solar Nail Liquid. Proteoglycan Monomers and Proteoglycan Aggregates. PG monomers are complex macromolecules composed of many GAGs covalently bonded to a core protein of varying length. Three dimensionally, the side chains attached to the core protein form the shape of a “bottle brush” (see Fig. 14-6). Nail Prime Acid Free Primer. Perfect Clr Sculpt Pwdr. Radical SolarNail Sculpt Liq. Retention Liquid. Retention Sculpt Liq. Scrubfresh. Shellac (All Colors) Solar Nail Liquid.Sally Hansen Miracle Gel Merry and Bright Collection Gingerbread Man-icure - 0.5 fl oz. $7.49 ... IntiMD TRUE-EMA Liquid Monomer 4 oz, Advanced GlamourShield Acrylic Formula, Nail Sally Hansen Miracle Gel Merry and Bright Collection Gingerbread Man-icure - 0.5 fl oz. $7.49 ... Currently, there are four colored monomers on the market: Creative Nail Design Systems’ purple-blue Radical Solarnail Liquid, NSI’s pink Choice Balancing Liquid, Alpha 9’s (Van Nuys, Calif.) Royal Blue Liquid, and Tammy Taylor Products’ (Irvine, Calif.) green Summer Liquid.Just Ask Sally Sally Favorites Trend Lookbook Pre-Fall Trends 2020 Pre-Fall Nail Care ... Monomer Liquid. $6.99 - $19.79 2 Size Options In-store Pickup 199.Monomer Liquid. 4 OZ | Item SBS-717033. $19.79. 199. This item earns at least 200 points! See details. In-Store Pickup.* LIQUID MONOMER & NAIL PREPS * MIA SECRET * SNS BASIC * TONY LY * VALENTINO * VALENTINO ACRYLIC COVER POWDER * YOUNG NAIL; DIPPING POWDER * DIPPING POWDER - CLEAR - P&W * DIP ALL ESSENTIALS * SNS dipping powder colors * OPI dipping powder colors * LDS dipping powder colors * Kiara sky dipping powder colors * Nugenesis dipping powder colors Kiara Sky offers professional nail supplies for nail techs & DIY-ers. Shop our nail supply collection online: acrylic, gel, glitter, dip powders, & more.What is it? No Lift Nails Monomer Liquid Features a sun block that filters out harmful UV rays which can cause yellowing. Ensures less buffing and less finishing work with optimum results. What makes it special? Allows "wetbrush" application for a better finish Less buffing and less finishing work We would like to show you a description here but the site won’t allow us.Highly unlikely, but will occur if large quantity of product comes in contact with an equally large quantity of monomer. 10.4 Conditions to Avoid: High heat 120 °F (48.8 °C) and proximity to monomers. (Large quantities only, e.g. > 1 gallon (3.785 liters)). 10.5 Incompatible Substances: Monomer. .
Popular Topics
- Affordable womenpercent27s haircut near meVector quantized image modeling with improved vqgan
- Fire tv 4 seriesR 34
- Does gelsonRust oleum tub tile refinishing kit stores
- Stop and shop delivery near meLilith conjunct part of fortune synastry
- Pepto bismol expired 1 year agoSigns you don
- Dollar20 off instacart promo code 2022Cue d
- Swedberg taylor funeral home obituariesSpn 520211