Chromium potassium sulfate dodecahydrate

OSHA PEL: TWA 0.5 mg(Cr)/m³
ACGIH TLV: TWA 0.5 mg(Cr)/m³; Not Classifiable as a Carcinogen.

The Chromium potassium sulfate dodecahydrate, with the CAS registry number 7788-99-0, is also known as Potassium chromium disulfate dodecahydrate. Its EINECS number is 233-401-6. This chemical's molecular formula is CrK^.(SO₄)₂^.12H₂O and molecular weight is 499.38. What's more, its systematic name is Chromium(3+) potassium sulfate hydrate (1:1:2:12). Its classification codes are: (1)Mutation data; (2)Tumor data. This chemical should be sealed and stored in a cool and dry place.

Physical properties of Chromium potassium sulfate dodecahydrate are: (1)ACD/LogP: -1.031; (2)# of Rule of 5 Violations: 0; (3)ACD/LogD (pH 5.5): -5.53; (4)ACD/LogD (pH 7.4): -5.53; (5)ACD/BCF (pH 5.5): 1.00; (6)ACD/BCF (pH 7.4): 1.00; (7)#H bond acceptors: 4; (8)#H bond donors: 2; (9)#Freely Rotating Bonds: 0; (10)Polar Surface Area: 82.98 Å²; (11)Enthalpy of Vaporization: 62.94 kJ/mol; (12)Boiling Point: 330 °C at 760 mmHg; (13)Vapour Pressure: 3.35E-05 mmHg at 25°C.

Preparation of Potassium chromium alum dodecahydrate: Potassium dichromate is dissolved in hot water, and then filtered. The filtrate turned to dark green after addition of concentrated sulfuric acid and ethanol(ethanol is dropped until the color of filtrate do not change again). Evaporate the filtrate, and add water until the relative density becomes 1.5. And you can get the product after crystallizing and drying.

Uses of Potassium chromium alum dodecahydrate: it is uses as tanning extracts, dye mordantin in printing and dyeing industry and fixing agent in photography. It is also used as analytical reagent. In addition, it is also used as food additive.

When you are using this chemical, please be cautious about it as the following:
This chemical is irritating to eyes and skin. In case of contact with eyes, you should rinse immediately with plenty of water and seek medical advice. You should not breathe dust. When using it, you must avoid contact with skin and eyes and wear suitable protective gloves and eye/face protection.

You can still convert the following datas into molecular structure:
(1)SMILES: [Cr+3].[K+].[O-]S(=O)(=O)[O-].[O-]S([O-])(=O)=O.O.O.O.O.O.O.O.O.O.O.O.O
(2)Std. InChI: InChI=1S/Cr.K.2H2O4S.12H2O/c;;2*1-5(2,3)4;;;;;;;;;;;;/h;;2*(H2,1,2,3,4);12*1H2/q+3;+1;;;;;;;;;;;;;;/p-4
(3)Std. InChIKey: ZFVHBEKVAITXHW-UHFFFAOYSA-J

The toxicity data is as follows:

Organism	Test Type	Route	Reported Dose (Normalized Dose)	Effect	Source
rat	LD50	intravenous	112mg/kg (112mg/kg)		Environmental Quality and Safety, Supplement. Vol. 1, Pg. 1, 1975.