IUPAC Name: Potassium ; Zinc ; Chromium(3+) ; Oxygen(2-) 
Following is the structure of Chromium potassium zinc oxide (CAS NO.37224-57-0):
              
Empirical Formula: CrKOZn
Molecular Weight of Chromium potassium zinc oxide (CAS NO.37224-57-0): 172.5006 g/mol
Canonical SMILES: [O-2].[K+].[Cr+3].[Zn+2]
InChI: InChI=1S/Cr.K.O.Zn/q+3;+1;-2;+2
InChIKey: XKGLANHAKJYNHE-UHFFFAOYSA-N

IARC Cancer Review: Human Sufficient Evidence IMEMDT IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals to Man . 23 , 1980,p. 205.(World Health Organization, Internation Agency for Research on Cancer,Lyon, France.: ) (Single copies can be ordered from WHO Publications Centre U.S.A., 49 Sheridan Avenue, Albany, NY 12210) ; Animal Sufficient Evidence IMEMDT    IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals to Man . 2 , 1973,p. 100.(World Health Organization, Internation Agency for Research on Cancer,Lyon, France.: ) (Single copies can be ordered from WHO Publications Centre U.S.A., 49 Sheridan Avenue, Albany, NY 12210) . Chromium and its compounds, as well as zinc and its compounds, are on the Community Right-To-Know List.

Confirmed carcinogen with experimental carcinogenic data. When heated to decomposition, Chromium potassium zinc oxide (CAS NO.37224-57-0) emits toxic fumes of Cr⁻ and Zn⁻.

OSHA PEL: CL 0.1 mg(CrO₃)/m³
ACGIH TLV: TWA 0.01 mg(Cr)/m³; Confirmed Human Carcinogen
DFG MAK: Human Carcinogen
NIOSH REL: (Chromium (VI)) TWA 0.001 mg(Cr(VI))/m³

 Chromium potassium zinc oxide , its cas register number is 37224-57-0. It also can be called Potassium zinc chromate ; and Zinc potassium chromate . Its classification code is Tumor data.