Product Details
Calcium stearate, alternatively named calcium octadecanoate, is a pale white crystalline powder. Its chemical formula is (C₁₇H₃₅COO)₂Ca, with a molecular weight of 607.00. It possesses a melting point of 179–180 °C and will undergo decomposition upon heating. This substance is insoluble in water, cold ethanol and diethyl ether. However, it can dissolve in hot benzene, toluene and turpentine, while being slightly soluble in hot ethanol and diethyl ether. It will decompose into stearic acid and the corresponding calcium salt once reacted with strong acids. Additionally, calcium stearate is hygroscopic and exhibits resistance to lipolytic microorganisms.
Calcium stearate Chemical Properties
| Melting point | 147-149°C |
| density | 1.08g/cm3 |
| vapor pressure | 0Pa at 25℃ |
| Fp | > 260 °C |
| storage temp | Store at +5°C to +30°C. |
| solubility | Soluble in hot pyridine, slightly soluble in oil, but insoluble in alcohol and ether. |
| form | Powder |
| color | white |
| PH | 7-9 (2.2 mg/l, H2O, 20°C) |
| Odor | Fatty acid odor |
| Water Solubility | insoluble H2O, ether, chloroform; slightly soluble hot mineral oils [MER06] |
| Merck | 14,1703 |
| BRN | 3919698 |
| Exposure limits | ACGIH: TWA 10 mg/m3; TWA 3 mg/m3 |
| Stability | Hygroscopic |
| InChIKey | CJZGTCYPCWQAJB-UHFFFAOYSA-L |
| LogP | 3.82-14.34 at 25℃ |
| CAS DataBase Reference | 1592-23-0(CAS DataBase Reference) |
| EPA Substance Registry System | Calcium stearate (1592-23-0) |
Safety Information
| Hazard Codes | Xn |
| Risk Statements | 20/21/22-36/37/38 |
| Safety Statements | 22-24/25-36-26 |
| WGK Germany | - |
| RTECS | WI3000000 |
| Autoignition Temperature | 460 °C DIN 51794 |
| TSCA | Yes |
| HS Code | 29157030 |
| Hazardous Substances Data | 1592-23-0(Hazardous Substances Data) |
| Toxicity | LD50 orally in Rabbit: > 10000 mg/kg |
Calcium stearate acts as an anti-caking and flow aid for powdered materials, applicable to specific food items including Smarties, and functions as a surface conditioning agent for hard candies such as Sprees. Besides, it can be used as a waterproof agent for textiles, as well as a lubricant for pencils and crayons.
Within the concrete sector, calcium stearate inhibits efflorescence on cement-derived products for concrete masonry units like paving bricks and blocks. Meanwhile, it can serve as a waterproof additive in this field.
