ChemicalBook--->CAS DataBase List--->7784-01-2

7784-01-2

7784-01-2 Structure

7784-01-2 Structure
IdentificationMore
[Name]

SILVER CHROMATE
[CAS]

7784-01-2
[Synonyms]

SILVER CHROMATE
SILVER(I) CHROMATE
chromicacid(h2cro4),disilver(1++)salt
Chromicacid,disilver(1+)salt
Silver(I)chromate,99%min
Silver chromate, pure, 99%
SILVER CHROMATE REAGENT
Silverchromate,99%
silver(I) chromate(VI)
Chromic acid disilver(I) salt
[EINECS(EC#)]

232-043-8
[Molecular Formula]

Ag2CrO4
[MDL Number]

MFCD00003402
[Molecular Weight]

331.73
[MOL File]

7784-01-2.mol
Chemical PropertiesBack Directory
[Appearance]

crystalline powder
[density ]

5,625 g/cm3
[form ]

Powder
[color ]

Red-brown
[Specific Gravity]

5.625
[Stability:]

Stable. but light-sensitive and hygroscopic.
[Water Solubility ]

Slightly soluble in water. Soluble in HNO<sub>3</sub> and ammonia
[Sensitive ]

Light Sensitive
[Merck ]

14,8510
[Solubility Product Constant (Ksp)]

pKsp: 11.95
[Exposure limits]

OSHA: Ceiling 0.1 mg/m3
NIOSH: IDLH 15 mg/m3; TWA 0.0002 mg/m3
[CAS DataBase Reference]

7784-01-2(CAS DataBase Reference)
[EPA Substance Registry System]

Chromic acid (H2CrO4), disilver(1+) salt (7784-01-2)
Safety DataBack Directory
[Hazard Codes ]

O,T,N
[Risk Statements ]

R8:Contact with combustible material may cause fire.
R43:May cause sensitization by skin contact.
R49:May cause cancer by inhalation.
R50/53:Very Toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment .
[Safety Statements ]

S17:Keep away from combustible material .
S45:In case of accident or if you feel unwell, seek medical advice immediately (show label where possible) .
S53:Avoid exposure-obtain special instruction before use .
S61:Avoid release to the environment. Refer to special instructions safety data sheet .
S60:This material and/or its container must be disposed of as hazardous waste .
[RIDADR ]

3087
[WGK Germany ]

3
[TSCA ]

Yes
[HazardClass ]

5.1
[PackingGroup ]

III
Hazard InformationBack Directory
[Chemical Properties]

crystalline powder
[Physical properties]

Red monoclinic crystals or brownish-red powder; density 5.625 g/cm3; insoluble in water; soluble in nitric acid, ammonia and solutions of alkali cyanides and chromates.
[Uses]

Catalyst for formation of aldol from alcohol; formed at end point of Mohr titration of halides.
[Preparation]

Silver chromate is prepared by slowly adding a solution of potassium chromate to a solution of silver nitrate:
2Ag+ (aq) + Cr4O2- (aq) → Ag2CrO4 (s)
The precipitate is washed with hot water.
[Purification Methods]

Wash the red-brown powder with H2O, dry it in a vacuum, then powder well and dry again in a vacuum at 90o/5hours. Its solubility in H2O is 0.0014% at 10o. Store it in the dark. [Cardillo & Shimizu J Org Chem 42 4268 1977.]
Well-known Reagent Company Product InformationBack Directory
[Alfa Aesar]

Silver(I) chromate, 99.9% (metals basis)(7784-01-2)
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