{"product_id":"cystine","title":"Cystine","description":"\u003cdiv class=\"mys-pdp\"\u003e\n\u003cp\u003e\u003cstrong\u003eCystine\u003c\/strong\u003e is an Amino acid supplied by MakeYourSkin as powder \/ liquid depending grade for professional cosmetic formulation. Used worldwide across mainstream cosmetic formulation, it is valued for hair-fiber support.\u003c\/p\u003e\n\u003ch2\u003eWhat is Cystine?\u003c\/h2\u003e\n\u003cp\u003eCystine is supplied under the INCI \/ technical name \u003cstrong\u003eCystine\u003c\/strong\u003e and carries CAS number \u003cstrong\u003e56-89-3\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eIt belongs to the \u003cstrong\u003eAmino acid\u003c\/strong\u003e group and is available from synthetic, nature-identical, botanical or biotech routes depending on the grade ordered. The material reaches you as powder \/ liquid depending grade. It is an established cosmetic raw material with mature supply and well-understood formulation behaviour.\u003c\/p\u003e\n\u003ch2\u003eKey Properties \u0026amp; Benefits\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eHair-fiber support\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003eSupplied cosmetic grade with a Certificate of Analysis for every batch.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eUses \u0026amp; Applications\u003c\/h2\u003e\n\u003cp\u003eCystine is used in scalp serums, hair tonics, pre-wash oils, shampoos, conditioners, leave-in treatments and hair masks.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTypical applications from the catalogue record:\u003c\/strong\u003e Scalp serums, tonics, shampoos, conditioners.\u003c\/p\u003e\n\u003cp\u003eIn hair care it is split between rinse-off systems, where substantivity decides how much survives the rinse, and leave-on scalp serums and tonics, where the full dose stays on the scalp.\u003c\/p\u003e\n\u003ch2\u003eHow to Use — Recommended Use Level\u003c\/h2\u003e\n\u003ctable class=\"mys-table\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eTypical use level\u003c\/th\u003e\n\u003ctd\u003e0.1–2%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRecommended pH\u003c\/th\u003e\n\u003ctd\u003e4.0–7.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAddition phase\u003c\/th\u003e\n\u003ctd\u003eWater phase\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSolubility\u003c\/th\u003e\n\u003ctd\u003eWater-soluble. Disperse into the water phase with stirring; avoid prolonged high heat where the material is heat-sensitive.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cp\u003e\u003cstrong\u003eGeneral rule:\u003c\/strong\u003e always begin at the lower end of the range, confirm the level against the supplier technical data sheet, and validate stability, pH, colour, odour and preservative efficacy on the finished formulation before scaling up.\u003c\/p\u003e\n\u003ch2\u003eTechnical Specification\u003c\/h2\u003e\n\u003ctable class=\"mys-table\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eINCI \/ Technical Name\u003c\/th\u003e\n\u003ctd\u003eCystine\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCAS Number\u003c\/th\u003e\n\u003ctd\u003e56-89-3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eIngredient Family\u003c\/th\u003e\n\u003ctd\u003eAmino acid\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePrimary Cosmetic Functions\u003c\/th\u003e\n\u003ctd\u003eHair-fiber support\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTypical Applications\u003c\/th\u003e\n\u003ctd\u003eScalp serums, tonics, shampoos, conditioners\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSource \/ Feedstock\u003c\/th\u003e\n\u003ctd\u003eSynthetic \/ nature-identical \/ botanical \/ biotech\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOrigin \/ Tradition\u003c\/th\u003e\n\u003ctd\u003eGlobal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTypical Bulk Form\u003c\/th\u003e\n\u003ctd\u003ePowder \/ liquid depending grade\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAppearance\u003c\/th\u003e\n\u003ctd\u003eSupplied as a powder or a liquid depending on the grade ordered\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSolubility\u003c\/th\u003e\n\u003ctd\u003eWater Soluble\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMarket Status\u003c\/th\u003e\n\u003ctd\u003eEstablished \/ trending\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCatalogue Range\u003c\/th\u003e\n\u003ctd\u003eExtended Range\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eStorage\u003c\/th\u003e\n\u003ctd\u003eStore in a tightly closed container at 15–25 °C, away from direct sunlight. Protect from freezing and from prolonged heat.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eShelf Life\u003c\/th\u003e\n\u003ctd\u003e24–36 months from manufacture in unopened original packaging; see the Certificate of Analysis\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eVendor\u003c\/th\u003e\n\u003ctd\u003eMakeYourSkin\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMYS Catalogue Code\u003c\/th\u003e\n\u003ctd\u003eCOS-A00250\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003ch2\u003eRegulatory Note\u003c\/h2\u003e\n\u003cp\u003eSold as a cosmetic raw material for professional formulation. A published INCI name does not by itself authorise use: the buyer is responsible for confirming permitted status, maximum concentration, restrictions by product type, labelling and claim rules in every market the finished product is sold in. In India, cosmetics fall under the Drugs and Cosmetics Act 1940 and the Cosmetics Rules 2020 administered by CDSCO, with BIS standards (including IS 4707 Part 2) listing restricted substances. The EU applies Regulation (EC) No 1223\/2009 and its Annexes; the United States applies the FD\u0026amp;C Act as amended by MoCRA; Korea, Japan and China operate their own positive lists and functional-cosmetic frameworks. Every finished product needs its own safety assessment.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eReference:\u003c\/strong\u003e \u003ca href=\"https:\/\/single-market-economy.ec.europa.eu\/sectors\/cosmetics\/cosmetic-ingredient-database_en\" rel=\"nofollow noopener\" target=\"_blank\"\u003eRegulatory \/ scientific reference\u003c\/a\u003e\u003c\/p\u003e\n\u003ch2\u003eDocumentation Supplied\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eCertificate of Analysis (CoA) for the batch supplied\u003c\/li\u003e\n\u003cli\u003eSafety Data Sheet (SDS \/ MSDS) in the current GHS format\u003c\/li\u003e\n\u003cli\u003eTechnical Data Sheet (TDS) with specification, solubility and handling guidance\u003c\/li\u003e\n\u003cli\u003eINCI declaration and, where assigned, CAS \/ EINECS numbers\u003c\/li\u003e\n\u003cli\u003eNon-GMO statement on request\u003c\/li\u003e\n\u003cli\u003eVegan \/ animal-origin declaration on request\u003c\/li\u003e\n\u003cli\u003eHalal and Kosher certification on request where the supplier holds it\u003c\/li\u003e\n\u003cli\u003eHeavy-metal and microbiological test data on request\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eAvailable Pack Sizes\u003c\/h2\u003e\n\u003cp\u003eSupplied in \u003cstrong\u003e50 g, 225 g, 1 Kg and 5 Kg\u003c\/strong\u003e packs. Bulk quantities above 5 Kg, and drum or sack quantities, are available on request — contact the MakeYourSkin sales desk for a quotation and lead time.\u003c\/p\u003e\n\u003ctable class=\"mys-table\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003e50 g\u003c\/th\u003e\n\u003ctd\u003ePilot batches and small production runs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003e225 g\u003c\/th\u003e\n\u003ctd\u003ePilot batches and indie production runs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003e1 Kg\u003c\/th\u003e\n\u003ctd\u003eRegular production for small and mid-size brands\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003e5 Kg\u003c\/th\u003e\n\u003ctd\u003eScaled production and contract manufacturing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003ch2\u003eDisclaimer \u0026amp; Caution in Use\u003c\/h2\u003e\n\u003cp\u003eFor external cosmetic use in professionally formulated products only. This is a concentrated raw material, not a finished cosmetic, and it is not intended for undiluted application to skin, for ingestion, or for any medicinal purpose. Wear gloves and eye protection when handling, avoid raising dust with powders, and keep out of reach of children and pets. Always run a patch test on the finished formulation, and validate stability, compatibility, pH and preservative efficacy before sale. Information supplied is offered in good faith as formulation guidance and does not constitute a safety assessment, a regulatory approval or a medical claim.\u003c\/p\u003e\n\u003cp\u003eFine powder — avoid generating and inhaling dust. Use local exhaust ventilation or a suitable respirator when weighing, and wet the powder into the formulation phase rather than dry-blending in open air.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"MakeYourSkin","offers":[{"title":"50 g","offer_id":47681076854946,"sku":"MYS-A00250-50G","price":40.5,"currency_code":"USD","in_stock":true},{"title":"225 g","offer_id":47681076887714,"sku":"MYS-A00250-225G","price":72.9,"currency_code":"USD","in_stock":true},{"title":"1 Kg","offer_id":47681076920482,"sku":"MYS-A00250-1000G","price":162.0,"currency_code":"USD","in_stock":true},{"title":"5 Kg","offer_id":47681076953250,"sku":"MYS-A00250-5000G","price":681.75,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0733\/0879\/9138\/files\/cystine-01_a4be3286-f5ca-4feb-a775-d202eb5eb0ae.webp?v=1789800306","url":"https:\/\/makeyourskin.com\/products\/cystine","provider":"MakeYourSkin","version":"1.0","type":"link"}