Chromic Nitrate
Title: Chromic Nitrate
CAS Registry Number: 13548-38-4
CAS Name: Nitric acid chromium(3+) salt
Additional Names: chromium(III) nitrate
Molecular Formula: CrN3O9
Molecular Weight: 238.01
Percent Composition: Cr 21.85%, N 17.65%, O 60.50%
Line Formula: Cr(NO3)3
Literature References: Prepn of anhydr salt from N2O5 and Cr(CO)6: Addison, Chapma, J. Chem. Soc. 1964, 539. Prepn of nonahydrate from Cr(OH)3 and dil HNO3 or by reducing CrO3 in the presence of HNO3: ACS Monograph Series no. 132, entitled "Chromium," vol. 1, M. J. Udy, Ed. (Reinhold, New York, 1956) pp 203-204. Toxicity study: Smyth et al., Am. Ind. Hyg. Assoc. J. 30, 470 (1969).
Properties: Pale green, extremely deliquesc powder. Non-volatile. Dec above 60°. Sol in water, ethyl acetate, DMSO. Practically insol in benzene, CCl4, CHCl3. Reacts with ether, sometimes vigorously.
Derivative Type: Nonahydrate
Properties: Deep violet, rhombic, monoclinic crystals. mp about 60°; dec above 100°. Sol in water, alcohol. Aq soln slowly becomes green on heating and rapidly recovers the reddish-violet color on cooling. LD50 orally in rats: 3.25 g/kg (Smyth).
Melting point: mp about 60°
Toxicity data: LD50 orally in rats: 3.25 g/kg (Smyth)
Use: Prepn of Cr catalyst; in textile printing; corrosion inhibitor.

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