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A15194 Ammonium chromate, 98+%

CAS Number
7788-98-9
Synonyms

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Bulk/Specialty

Ammonium chromate, 98+%

MDL
MFCD00015958
EINECS
232-138-4

Chemical Properties

Formula
(NH4)2CrO4
Formula Weight
152.07
Melting point
180° dec.
Density
1.91
Storage & Sensitivity
Ambient temperatures.
Solubility
Soluble in water (340g/L).

Applications

Ammonium chromate is a reagent for the preparation of a solid heterogeneous oxidizing agent for liquid phase oxidation of alcohols. Also used in in photography, textile printing, and fixing chromate dyes on wool; Also used as an analytical reagent, catalyst, and corrosion inhibitor.

Notes

Store in cool, dry place in tightly closed container. Store away from reducing agent and metal powders.

Literature References

R. Rajeeva, K.A. Devi; Annamma Abraham; K. Krishnan; T.E. Krishnana, K.N. Ninan; C.G.R. Nair. Thermal decomposition studies. Part 19. Kinetics and mechanism of thermal decomposition of copper ammonium chromate precursor to copper chromite catalyst and correlation of surface parameters of the catalyst with propellant burning rate. Thermochimica Acta, 1995, 254235-247.

Il-Hyun Park. Thermal Decomposition of Ammonium Salts of Transition Metal Oxyacids. III. Thermogravimetric Analysis of Ammonium Chromate. Bulletin of the Chemical Society of Japan, 1972, 45(9), 2749-2752.

GHS Hazard and Precautionary Statements

Hazard Statements: H272-H314-H317-H334-H335-H350i

May intensify fire; oxidizer. Causes severe skin burns and eye damage. May cause an allergic skin reaction. May cause allergy or asthma symptoms or breathing difficulties if inhaled. May cause respiratory irritation. May cause cancer by inhalation.

Precautionary Statements: P201-P202-P210-P220-P221-P260-P264b-P271-P272-P280g-P281-P285-P301+P330+P331-P303+P361+P353-P304+P340-P305+P351+P338-P310-P333+P313-P363-P370+P378q-P501c

Obtain special instructions before use. Do not handle until all safety precautions have been read and understood. Keep away from heat/sparks/open flames/hot surfaces. - No smoking. Keep/Store away from clothing/combustible materials. Take any precaution to avoid mixing with combustibles. Do not breathe dust/fume/gas/mist/vapours/spray. Wash face, hands and any exposed skin thoroughly after handling Use only outdoors or in a well-ventilated area. Contaminated work clothing should not be allowed out of the workplace. Wear protective gloves. Use personal protective equipment as required. In case of inadequate ventilation wear respiratory protection. IF SWALLOWED: Rinse mouth. Do NOT induce vomiting. IF ON SKIN (or hair): Remove/Take off immediately all contaminated clothing. Rinse skin with water/shower. IF INHALED: Remove to fresh air and keep at rest in a position comfortable for breathing. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. Immediately call a POISON CENTER or doctor/physician. If skin irritation or rash occurs: Get medical advice/attention. Wash contaminated clothing before reuse. In case of fire: Use CO2, dry chemical, or foam Dispose of contents/ container to an approved waste disposal plant

Other References

Merck
14,510
Hazard Class
5.1
Packing Group
II
Harmonized Tariff Code
2841.50
TSCA
Yes

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