Cadmium stearate

Cadmium stearate
Names
IUPAC name
Cadmium dioctadecanoate
Other names
Cadmium distearate; Cadmium(II) stearate; Cadmium(II) dioctadecanoate
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.017.040 Edit this at Wikidata
EC Number
  • 218-743-6
UNII
  • InChI=1S/2C18H36O2.Cd/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
  • [Cd+2].[O-]C(=O)CCCCCCCCCCCCCCCCC.[O-]C(=O)CCCCCCCCCCCCCCCCC
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)
NFPA 704 four-colored diamondHealth 4: Very short exposure could cause death or major residual injury. E.g. VX gasFlammability 0: Will not burn. E.g. waterInstability 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g. liquid nitrogenSpecial hazards (white): no code
4
0
0
NIOSH (US health exposure limits):
PEL (Permissible)
 [1910.1027] TWA 0.005 mg/m3 (as Cd)[1]
REL (Recommended)
 Ca[1]
IDLH (Immediate danger)
 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).

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

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

Like other cadmium compounds, cadmium stearate is toxic.[3] Cadmium stearate is also carcinogen.[4]

References

  1. ^ a b c NIOSH Pocket Guide to Chemical Hazards. "#0087". National Institute for Occupational Safety and Health (NIOSH).
  2. ^ 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.
  3. ^ 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
  4. ^ Cadmium stearate. MSDS