| Identification | More | [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 Properties | Back Directory | [Appearance]
crystalline powder | [density ]
5,625 g/cm3 | [storage temp. ]
RT, protect from light | [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 | [Major Application]
PEM fuel cells
material synthesis precursor | [InChI]
1S/2Ag.Cr.4O/q2*+1;;;;2*-1 | [InChIKey]
OJKANDGLELGDHV-UHFFFAOYSA-N | [SMILES]
[Ag+].[Ag+].[O-][Cr]([O-])(=O)=O | [CAS DataBase Reference]
7784-01-2(CAS DataBase Reference) | [EPA Substance Registry System]
Chromic acid (H2CrO4), disilver(1+) salt (7784-01-2) |
| Safety Data | Back 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 | [Storage Class]
5.1B - Oxidizing hazardous materials | [Hazard Classifications]
Aquatic Acute 1
Aquatic Chronic 1
Carc. 1B
Ox. Sol. 2
Skin Sens. 1 |
| Hazard Information | Back 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.] |
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