Cadmium stearate
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| Names | |
|---|---|
| IUPAC name
Cadmium dioctadecanoate
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| Other names
Cadmium distearate; Cadmium(II) stearate; Cadmium(II) dioctadecanoate
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| Identifiers | |
3D model (JSmol)
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| ChemSpider | |
| ECHA InfoCard | 100.017.040 |
| EC Number |
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PubChem CID
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| UNII | |
CompTox Dashboard (EPA)
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| Properties | |
| C36H70CdO4 | |
| Molar mass | 679.366 g·mol−1 |
| Appearance | White powder |
| Density | 1.80 g/cm3 |
| Melting point | 134 °C (273 °F; 407 K) |
| Hazards | |
| NFPA 704 (fire diamond) | |
| NIOSH (US health exposure limits): | |
PEL (Permissible)
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[1910.1027] TWA 0.005 mg/m3 (as Cd)[1] |
REL (Recommended)
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Ca[1] |
IDLH (Immediate danger)
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Ca [9 mg/m3 (as Cd)][1] |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Cadmium stearate is a salt with the formula Cd(O2CC17H35)2. Classified as a metallic soap, this a white solid is used as a lubricant and as a heat- and light-stabilizer in polyvinyl chloride. The use of cadmium stearate is being phased out because of its toxicity.
Synthesis
[edit]The compound is produced by the reaction of cadmium chloride with sodium stearate or heating stearic acid and cadmium oxide or hydroxide.[2] Also, an exchange reaction between cadmium sulfate and sodium stearate:
- CdSO4 + 2 NaC18H35O2 → Cd(C18H35O2)2↓ + Na2SO4
Safety
[edit]Like other cadmium compounds, cadmium stearate is toxic.[3] Cadmium stearate is also carcinogen.[4]
References
[edit]- ^ a b c NIOSH Pocket Guide to Chemical Hazards. "#0087". National Institute for Occupational Safety and Health (NIOSH).
- ^ Nora, Angelo; Szczepanek, Alfred; Koenen, Gunther (2001). "Metallic Soaps". Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. doi:10.1002/14356007.a16_361. ISBN 978-3527306732.
- ^ 40 C.F.R.: Appendix A to Part 355—The List of Extremely Hazardous Substances and Their Threshold Planning Quantities (PDF) (July 1, 2008 ed.), Government Printing Office, archived from the original (PDF) on February 25, 2012, retrieved October 29, 2011
- ^ Cadmium stearate. MSDS