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AMMONIUM CHROMATE

Basic information Safety Supplier Related

AMMONIUM CHROMATE Basic information

Product Name:
AMMONIUM CHROMATE
Synonyms:
  • ammoniumchromate(vi)
  • chromicacid(h2cro4),diammoniumsalt
  • chromicacid[h2cro4],diammoniumsalt
  • diammoniumchromate
  • neutralammoniumchromate
  • AMMONIUM CHROMATE
  • Ammonium chronate
  • AmmoniumDichromate,>99%
CAS:
7788-98-9
MF:
CrH8N2O4
MW:
152.07
EINECS:
232-138-4
Product Categories:
  • Ammonium Salts
  • Metal and Ceramic Science
  • Inorganic Chemicals
  • Salts
Mol File:
7788-98-9.mol
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AMMONIUM CHROMATE Chemical Properties

Melting point:
180°C (dec.)
Density 
1.91 g/mL at 25 °C (lit.)
solubility 
H2O: 1 M at 20 °C, clear, yellow
form 
Crystalline
Specific Gravity
1.91
color 
Yellow-orange
Water Solubility 
Soluble in water. Slightly soluble in liquid ammonia, acetone, methanol. Insoluble in ethanol.
Merck 
14,510
Exposure limits
ACGIH: TWA 0.0002 mg/m3; STEL 0.0005 mg/m3 (Skin)
OSHA: Ceiling 0.1 mg/m3
NIOSH: IDLH 15 mg/m3; TWA 0.0002 mg/m3
CAS DataBase Reference
7788-98-9(CAS DataBase Reference)
EPA Substance Registry System
Ammonium chromate (7788-98-9)
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Safety Information

Hazard Codes 
O,T,N
Risk Statements 
49-8-43-50/53-34
Safety Statements 
53-17-45-60-61-36/37/39-26
RIDADR 
UN 1479 5.1/PG 2
WGK Germany 
3
RTECS 
GB2880000
TSCA 
Yes
HazardClass 
5.1
PackingGroup 
III
Hazardous Substances Data
7788-98-9(Hazardous Substances Data)

MSDS

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AMMONIUM CHROMATE Usage And Synthesis

Chemical Properties

Ammonium chromate is a yellow crystalline compound which can be used in solution, which is yellow with an ammonia odor.

Uses

Ammonium chromate, is used in photography as a sensitizer for gelatin coatings. It's often used in photography, textile printing, and fixing chromate dyes on wool. It is also used as an analytical reagent, catalyst.

Uses

Reagent for the preparation of a solid heterogeneous oxidizing agent for liquid phase oxidation of alcohols.

Uses

Sensitizing gelatin in photography, in textile printing pastes, in fixing chromate dyes on wool, and as a reagent in analytical chemistry.

Hazard

Toxic by inhalation, strong irritant. Con- firmed carcinogen.

Safety Profile

A poison. Mutation data reported. See also CHROMIUM COMPOUNDS. A powerful oxidizer. An explosion hazard when shocked or heated. When heated to decomposition it emits toxic fumes of NH3, Cr03, and NOx. Incompatible with reducing agents.

Potential Exposure

It is used to inhibit corrosion and in dyeing, photography and many chemical reactions. Used as a fungicide and fire retardant.

Shipping

UN3288 Toxic solids, inorganic, n.o.s., Hazard Class: 6.1; Labels: 6.1-Poisonous materials, Technical Name Required.

Purification Methods

Crystallise it from weak aqueous ammonia (ca 2.5mL/g) by cooling from room temperature. It loses NH3 on heating to form ammonium dichromate. POISONOUS.

Incompatibilities

A strong oxidizer and an explosive. Contact with combustible, organic and other readily oxidizable substances may cause fire and explosions. Hydrazine, other reducing agents. Corrosive to metals.

Waste Disposal

Consult with environmental regulatory agencies for guidance on acceptable disposal practices. Generators of waste containing this contaminant (≥100 kg/mo) must conform with EPA regulations governing storage, transportation, treatment, and waste disposal. Addition of a large volume of a reducing agent solution (hypo, bisulfite or ferrous salt, and acidify with 3 M sulfuric acid). When reduction is complete, flush to drain with large volumes of water.

AMMONIUM CHROMATE Preparation Products And Raw materials

Preparation Products

Raw materials

AMMONIUM CHROMATESupplier

Meryer (Shanghai) Chemical Technology Co., Ltd.
Tel
021-61259108 18621169109
Email
market03@meryer.com
Alfa Aesar
Tel
400-6106006
Email
saleschina@alfa-asia.com
Energy Chemical
Tel
021-021-58432009 400-005-6266
Email
sales8178@energy-chemical.com
Sinopharm Chemical Reagent Co,Ltd.
Tel
86-21-63210123
Email
sj_scrc@sinopharm.com
Spectrum Chemical Manufacturing Corp.
Tel
021-021-021-67601398-809-809-809 15221380277
Email
marketing_china@spectrumchemical.com