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7788-98-9

Basic Information
CAS No.: 7788-98-9
Name: Ammonium chromate
Molecular Structure:
Molecular Structure of 7788-98-9 (Ammonium chromate)
Formula: CrH2O4. 2H3N
Molecular Weight: 152.10
Synonyms: Ammoniumchromate(VI) (6CI);Chromic acid (H2CrO4), diammonium salt (8CI,9CI);Ammoniumchromate;Ammonium chromate ((NH4)2CrO4);Chromic acid ammonium salt;Diammonium chromate;Diammonium chromate ((NH4)2CrO4);Neutral ammoniumchromate;
EINECS: 232-138-4
Density: 1.91 g/mL at 25 °C(lit.)
Melting Point: 180 °C (dec.)
Solubility: Soluble in water: 1 M at 20 °C
Appearance: Yellow crystals
Hazard Symbols: OxidizingO,ToxicT,DangerousN
Risk Codes: 49-8-43-50/53
Safety: 53-17-45-60-61
Transport Information: UN 1479 5.1/PG 2
PSA: 81.08000
LogP: 0.05660
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    CAS Number:7788-98-9 Molecular Formula:CrH8N2O4 Ammonium Chromate

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Chemistry

Chemistry informtion about Neutral Ammonium Chromate (CAS NO.7788-98-9) is:
IUPAC Name: Diazanium Dioxido(Dioxo)Chromium
Synonyms: Ammoniumchromate(Vi) ; Chromicacid(H2cro4),Diammoniumsalt ; Chromicacid[H2cro4],Diammoniumsalt ; Diammoniumchromate ; Neutralammoniumchromate ; Ammonium Chromate ; Ammonium Chronate ; Ammoniumdichromate,>99% 
Product Categories: Inorganic Chemicals ; Ammonium Salts ; Metal and Ceramic Science ; Salts
MF: CrH8N2O4
MW: 152.07
EINECS: 232-138-4
Melting Point: 180°C (dec.)
Density: 1.91 g/mL at 25 °C(lit.)
Merck: 14,510
Following is the molecular structure of Neutral Ammonium Chromate (CAS NO.7788-98-9) is:

Production

Preparation Products is Furfuryl alcohol .And Raw materials are Ammonia --> Chromic acid --> Potassium sulfate --> Potassium chromate --> Ammonium dichromate .

Toxicity Data With Reference

1.    

mmo-sat 35 µg/plate

    CRNGDP    Carcinogenesis. 9 (1988),611.
2.    

dnr-esc 25 µg/well

    MUREAV    Mutation Research. 133 (1984),161.

Consensus Reports

Reported in EPA TSCA Inventory.

Safety Profile

Mutation data reported. When heated to decomposition it emits toxic vapors of NH4
Safty information about Neutral Ammonium Chromate (CAS NO.7788-98-9) :
Hazard Codes:
OxidizingO
ToxicT
DangerousN
Risk Statements:
R49:May cause cancer by inhalation. 
R8 :Contact with combustible material may cause fire. 
R43:May cause sensitization by skin contact. 
R50/53:Very toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment.
Safety Statements:
S53:Avoid exposure - obtain special instructions before use. 
S17:Keep away from combustible material. 
S45:In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) 
S60:This material and its container must be disposed of as hazardous waste. 
S61:Avoid release to the environment. Refer to special instructions / safety data sheets.
53-17-45-60-61
RIDADR UN 1479 5.1/PG 2
WGK Germany: 3
RTECS: GB2880000
HazardClass: 5.1
PackingGroup: III

Standards and Recommendations

OSHA PEL: CL 0.1 mg(CrO3)/m3
ACGIH TLV: TWA 0.05 mg(Cr)/m3
NIOSH REL: (Chromium(VI)): TWA 0.001 mg(Cr)/m3

Analytical Methods

For occupational chemical analysis use NIOSH: chromium hexavalent 7024.

Specification

To protect yourself,you can put on eyeshields, faceshields, full-face particle respirator type N100 (US), gloves, respirator cartridge type N100 (US), type P1 (EN143) respirator filter, type P3 (EN 143) respirator cartridges .