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Zinc Stearate CAS#557-05-1
CAS Number: 557-05-1
Chemical Formula: C36H70O4Zn
Synonyms:
Afco-chem ZNS
Zinc Stearate, Zno
stavinorzn-e
MOQ (Minimum Order Quantity): 1 FCL (Full Container Load)
Appearance: White Powder
Zinc stearate is a "zinc soap" that is widely used industrially. In this context, soap is used in its formal sense, a metal "salt" of a fatty acid. It is a white solid that repels water. It is insoluble in polar solvents such as alcohol and ether but soluble in aromatic hydrocarbons (e.g., benzene and chlorinated hydrocarbons) when heated. It is the most powerful mold release agent among all metal soaps. It contains no electrolyte and has a hydrophobic effect. Its main application areas are the plastics and rubber industry where it is used as a releasing agent and lubricant which can be easily incorporated.
Zinc carboxylates, e.g. basic zinc acetate, adopt complex formulas, and are not simply dicarboxylates of zinc. Instead the formula for most zinc carboxylates is Zn4O(O2CR)6, consisting of a Zn4O6+ core with carboxylate ligands spanning the edges.
Zinc stearate Chemical Properties |
Melting point | 128-130 °C (lit.) |
Boiling point | 240℃[at 101 325 Pa] |
density | 1.095g/cm3 |
vapor pressure | 0Pa at 25℃ |
Fp | 180℃ |
storage temp. | Inert atmosphere,Room Temperature |
solubility | alcohol: insoluble(lit.) |
form | Powder |
color | White |
Odor | wh. powd., faint char. odor |
Water Solubility | Insoluble |
Merck | 14,10158 |
BRN | 3919706 |
Exposure limits | ACGIH: TWA 10 mg/m3; TWA 3 mg/m3 |
Stability: | Stable. Incompatible with strong oxidizing agents. |
Cosmetics Ingredients Functions | VISCOSITY CONTROLLING |
InChI | 1S/2C18H36O2.Zn/c2*1-2-3-4-5-6-7-8-9-10-11-12-13-14-15-16-17-18(19)20;/h2*2-17H2,1H3,(H,19,20);/q;;+2/p-2 |
InChIKey | XOOUIPVCVHRTMJ-UHFFFAOYSA-L |
SMILES | CCCCCCCCCCCCCCCCCC(=O)O[Zn]OC(=O)CCCCCCCCCCCCCCCCC |
LogP | 4.64 at 25℃ |
CAS DataBase Reference | 557-05-1(CAS DataBase Reference) |
NIST Chemistry Reference | Zinc(II) n-octadecanoate(557-05-1) |
EPA Substance Registry System | Zinc stearate (557-05-1) |
Safety Information |
Hazard Codes | Xi |
Risk Statements | 37 |
Safety Statements | 22-26-36/37/39-38-24/25 |
OEB | B |
OEL | TWA: 10 mg/m3 (total) |
WGK Germany | - |
RTECS | ZH5200000 |
Autoignition Temperature | 1454 °F |
TSCA | TSCA listed |
HS Code | 29157090 |
Storage Class | 11 - Combustible Solids |
Hazard Classifications | Aquatic Acute 1 |
Hazardous Substances Data | 557-05-1(Hazardous Substances Data) |
Toxicity | LD50 oral in rat: > 10gm/kg |
Product Application of Zinc Stearate CAS#557-05-1
It is widely used as a release agent for the production of many kinds of objects rubber, poly urethane, poly ester processing system, powder metallurgy. These applications exploit its "non-stick" properties . In cosmetics, zinc stearate is a lubricant and thickening to improve texture.
It is an "activator" for rubber vulcanization by sulfur and accelerators. As discovered in the early days of vulcanization, zinc has a beneficial effect on the reaction of the sulfur with the polyolefin. The stearate is a form of zinc that is highly soluble in the nonpolar medium of the poly olefins.
Being lipophilic, it functions as a phase transfer catalyst for the saponification of fats.
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