Nomenclature
CAS number: 7775-11-3
Neutral sodium chromate.
CrNa
2O
4; mol wt 161.97.
Cr 32.10%, Na 28.39%, O 39.51%.
Na
2CrO
4.
Description and references
Crystallizes as a tetra- or decahydrate. Manuf:
Faith, Keyes & Clark's Industrial Chemicals, F. A. Lowenheim, M. K. Moran, Eds. (Wiley-Interscience, New York,
4th ed., 1975) pp 731-736. Diagnostic use of labeled compound in
GI bleeding: A. Lussier et al., Semin. Arthritis Rheum. 17, Suppl. 2, 40-45
(1988). Review of use as radiolabel for blood elements: Diagnostic
and Investigational Uses of Radiolabeled Blood Elements, R.
J. Davey, M. E. Wallace, Eds., (Am. Assoc. Blood Banks, Arlington,
1987) 118 pp.
Derivative
Tetrahydrate.
Properties
Yellow, somewhat deliquesc crystals. Sol in about
1 part water, slightly in alcohol. The aq soln is alkaline. Keep well closed. The decahydrate is unstable
with respect to water content. mp ≈20°.Derivative
51Cr-Labeled compound.
Nomenclature
CAS number: 10039-53-9
Sodium chromate-
51Cr; sodium radio-chromate(
51Cr); Chromitope Sodium (BMS); Rachromate-51 (Abbott).
51CrNa2O4.
Properties
Prepd from radioactive chromium (51Cr) which has a half-life of 27.7 days. The emission of gamma rays
is applicable to biological tagging and tracing. Other properties
identical to those of unlabeled sodium chromate.Caution
Chromium hexavalent compounds are
listed as known human carcinogens: Report
on Carcinogens, Eleventh Edition (PB2005-104914, 2004)
p III-63.Use
Protection of iron against corrosion and rusting.
Therapeutic Category
51Cr-labeled compound as diagnostic aid (blood volume
determination; blood cell survival).
Keywords
Sodium Chromate(VI), Radioactive: Diagnostic Aid