| Identification | More | [Name]
AMMONIUM CHROMATE | [CAS]
7788-98-9 | [Synonyms]
AMMONIUM CHROMATE
ammoniumchromate(vi)
chromicacid(h2cro4),diammoniumsalt
chromicacid[h2cro4],diammoniumsalt
diammoniumchromate
neutralammoniumchromate
Ammonium chronate
AmmoniumDichromate,>99%
Ammoniumchromate,98+%
AMMONIUM CHROMATE REAGENT
ammonium chromate, reagent grade
AMMONIUMCHROMATE,POWDER,REAGENT
Ammoniummonochromat | [EINECS(EC#)]
232-138-4 | [Molecular Formula]
CrH8N2O4 | [MDL Number]
MFCD00015958 | [Molecular Weight]
152.07 | [MOL File]
7788-98-9.mol |
| Chemical Properties | Back Directory | [Appearance]
Ammonium chromate is a yellow crystalline
compound which can be used in solution, which is yellow
with an ammonia odor. | [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 | [color ]
Yellow-orange | [Specific Gravity]
1.91 | [Water Solubility ]
Soluble in water. Slightly soluble in liquid ammonia, acetone, methanol. Insoluble in ethanol. | [Merck ]
14,510 | [CAS DataBase Reference]
7788-98-9(CAS DataBase Reference) | [EPA Substance Registry System]
Ammonium chromate (7788-98-9) |
| Safety Data | Back Directory | [Hazard Codes ]
O,T,N | [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 instruction before use .
S17:Keep away from combustible material .
S45:In case of accident or if you feel unwell, seek medical advice immediately (show label where possible) .
S60:This material and/or its container must be disposed of as hazardous waste .
S61:Avoid release to the environment. Refer to special instructions safety data sheet . | [RIDADR ]
UN 1479 5.1/PG 2
| [WGK Germany ]
3
| [RTECS ]
GB2880000
| [TSCA ]
Yes | [HazardClass ]
5.1 | [PackingGroup ]
III | [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. | [Hazardous Substances Data]
7788-98-9(Hazardous Substances Data) |
| Hazard Information | Back Directory | [Hazard]
Toxic by inhalation, strong irritant. Con-
firmed carcinogen.
| [Potential Exposure]
It is used to inhibit corrosion and in
dyeing, photography and many chemical reactions. Used as
a fungicide and fire retardant. | [First aid]
If this chemical gets into the eyes, remove any
contact lenses at once and irrigate immediately for at least
30 minutes, occasionally lifting upper and lower lids. Seek
medical attention immediately. If this chemical contacts the
skin, remove contaminated clothing and wash immediately
with soap and water. Seek medical attention immediately.
If this chemical has been inhaled, remove from exposure,
begin rescue breathing (using universal precautions, including
resuscitation mask) if breathing has stopped and CPR if
heart action has stopped. Transfer promptly to a medical
facility. When this chemical has been swallowed, get medical
attention. Give large quantities of water and induce
vomiting. Do not make an unconscious person vomit. | [Shipping]
UN3288 Toxic solids, inorganic, n.o.s., Hazard
Class: 6.1; Labels: 6.1-Poisonous materials, Technical
Name Required. | [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. | [Chemical Properties]
Ammonium chromate is a yellow crystalline
compound which can be used in solution, which is yellow
with an ammonia odor. | [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. | [Uses]
Reagent for the preparation of a solid heterogeneous oxidizing agent for liquid phase oxidation of alcohols. | [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]
Sensitizing gelatin in photography, in textile printing pastes, in fixing chromate dyes on wool, and as a reagent in analytical chemistry. | [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. |
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