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Chromic acid

Chromic acid
Chromic acid structure
CAS No.
7738-94-5
Chemical Name:
Chromic acid
Synonyms
Cromic acid;CHROMIC ACID;dihydroxy(diketo)chromium
CBNumber:
CB52130391
Molecular Formula:
H2CrO4
Formula Weight:
118.01
MOL File:
7738-94-5.mol

Chromic acid Properties

Melting point:
196°C
Density 
2.290
form 
Liquid
color 
Clear, orange
Water Solubility 
HIGHLY Soluble
EPA Substance Registry System
Chromic acid (H2CrO4)(7738-94-5)
SAFETY
  • Risk and Safety Statements
  • NFPA
RIDADR  UN 1463/1755
Hazardous Substances Data 7738-94-5(Hazardous Substances Data)

NFPA 704

Diamond Hazard Value Description
0
3 1
OX
Health   3 Short exposure could cause serious temporary or moderate residual injury (e.g. liquid hydrogen, sulfuric acid, calcium hypochlorite, hexafluorosilicic acid)
Flammability   0 Materials that will not burn under typical fire conditions, including intrinsically noncombustible materials such as concrete, stone, and sand. Materials that will not burn in air when exposed to a temperature of 820 °C (1,500 °F) for a period of 5 minutes.(e.g. Carbon tetrachloride)
Instability   1 Normally stable, but can become unstable at elevated temperatures and pressures (e.g. propene)
Special   OX

(NFPA, 2010)

Chromic acid price

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Chromic acid Chemical Properties,Uses,Production

Chemical Properties

Chromic acid is a dark purplish-red odorless flakes or crystalline powder

Uses

Chemicals (chromates, oxidizing agents, catalysts), chromium-plating intermediate, medicine (caustic), process engraving, anodizing, ceramic glazes, colored glass, metal cleaning, inks, tanning, paints, textile mordant, etchant for plastics.

Definition

The name is in common use, although the true chromic acid, H2CrO4, exists only in solution.

Definition

chromic acid: A hypothetical acid,H2CrO4, known only in chromatesalts.

General Description

Chromic acid is a dark purplish red solid, exists only in solution. The hydrate of chromiumoxide, it is used in electroplating baths. Chromic acid is soluble in water with the release of heat. The material itself is noncombustible but Chromic acid will accelerate the burning of combustible materials. Its solution is corrosive to metals and tissue.

Air & Water Reactions

Water soluble.

Reactivity Profile

A very powerful oxidizing agent, confirmed human carcinogen. Upon contact with reducing reagents Chromic acid can cause a violent explosion, in contact with organic matter Chromic acid may cause a violent oxidation leading to ignition. Dangerously reactive with acetone, alcohols, alkali metals (sodium, potassium), ammonia, arsenic, dimethylformamide, hydrogen sulfide, phosphorus, peroxyformic acid, pyridine, selenium, sulfur, and many other chemicals [Sax, 9th ed., 1996, p. 852]. When mixed with sulfuric acid for glass cleaning operations, used solution in closed bottle may explode due to internal pressure of carbon dioxide arising from contamination by carbon compounds [Bryson, W. R., Chem. Brit., 1975, 11, p. 377].

Hazard

A human carcinogen. A poison. Corrosive to skin. Powerful oxidizing agent, may explode on contact with reducing agents, may ignite on contact with organic materials. Upper respiratory tract irritant.

Health Hazard

Very irritating to eyes and respiratory tract. Ingestion causes severe gastrointestinal symptoms. Contact with eyes or skin causes burns; prolonged contact produces dermatitis (``chrome sores'').

Fire Hazard

Behavior in Fire: Containers may explode

Safety Profile

Confirmed human carcinogen. Poison by subcutaneous route. Mutation data reported. A powerful oxidzer. A powerful irritant of skin, eyes, and mucous membranes. Can cause a dermatitis, bronchoasthma, “chrome holes,” damage to the eyes. Dangerously reactive. Incompatible with acetic acid, acetic anhydride, tetrahydronaphthalene, acetone, alcohols, alkali metals, ammonia, arsenic, bromine penta fluoride, butyric acid, n,ndimethylformamide, hydrogen sulfide, peroxyformic acid, phosphorus, potassium hexacyanoferrate, pyridme, selenium

Potential Exposure

n chromium plating; medicine, ceramic glazers, and paints.

First aid

Move victim to fresh air. Call 911 or emergency Medical service. Give artificial respiration if victim is not breathing. Do not use mouth-to-mouth method if victim ingested or inhaled the substance; give artificial respiration with the aid of a pocket mask equipped with a one-way valve or other proper respiratory medical device. Administer oxygen if breathing is difficult. Remove and isolate contaminated clothing and shoes. In case of contact with substance, immediately flush skin or eyes with running water for at least 20 minutes. For minor skin contact, Chromic(VI) Acid 833 Avoid spreading material on unaffected skin. Keep victim warm and quiet. Effects of exposure (inhalation, ingestion, or skin contact) to substance may be delayed. Ensure that medical personnel are aware of the material(s) involved and take precautions to protect themselves. Medical observation is recommended for 24 to 48 hours after breathing overexposure, as pulmonary edema may be delayed. As first aid for pulmonary edema, a doctor or authorized paramedic may consider administering a drug or other inhalation therapy

Shipping

UN1463 Chromium trioxide, anhydrous, Hazard Class: 5.1; Labels: 5.1-Oxidizer, 6.1-Poisonous materials, 8-Corrosive material. UN1755 (solution) Chromic acid, solid, Hazard class: 8; Labels: 8-Corrosive material.

Incompatibilities

A strong oxidizer. Aqueous solution is strongly acidic. Reacts with acetic acid, acetic anhydride, acetone, anthracene, chromous sulfide; diethyl ether; dimethyl formamide; ethanol, hydrogen sulfide; methanol, naphthalene, camphor, glycerol, potassium ferricyanide, pyridine, turpentine, combustibles; organics, and other easily oxidized materials (such as paper, wood, sulfur, aluminum, and plastics). Attacks metals in presence of moisture

Waste Disposal

Chemical reduction to chromium(III) can be followed by land fill disposal of the sludge.

Chromic acid Preparation Products And Raw materials

Raw materials

Preparation Products


Chromic acid Suppliers

Global( 36)Suppliers
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