Ammonium dichromate
- CAS No.
- 7789-09-5
- Chemical Name:
- Ammonium dichromate
- Synonyms
- ammoniumdichromat;ammoniumbichromaat;ammoniumdichromaat;AMMONIUM BICHROMATE;AMMONIUM DICHROMATE;diammoniumdichromate;bichromated’ammonium;ammonio(bicromatodi);ammonio(dicromatodi);AMMONIUM PYROCHROMATE
- CBNumber:
- CB9854341
- Molecular Formula:
- Cr2H8N2O7
- Molecular Weight:
- 252.06
- MOL File:
- 7789-09-5.mol
- MSDS File:
- SDS
- Modify Date:
- 2025/1/27 9:38:02
| Melting point | 170 °C (dec.)(lit.) |
|---|---|
| Density | 2.150 |
| vapor density | 8.7 (vs air) |
| solubility | H2O: 1 M at 20 °C, clear, colorless |
| form | Solid |
| color | Orange to red |
| PH | 3-4 (25°C, 50g/L) |
| Odor | Odorless |
| PH Range | 3 - 4 |
| Water Solubility | 360 g/L (20 ºC) |
| Decomposition | 170 °C |
| Merck | 14,515 |
| Exposure limits |
ACGIH: TWA 0.0002 mg/m3; STEL 0.0005 mg/m3 (Skin) OSHA: Ceiling 0.1 mg/m3 NIOSH: IDLH 15 mg/m3; TWA 0.0002 mg/m3 |
| Stability | Stability Strong oxidizer - contact with flammable materials may cause fire. Reactions carried out in closed vessels may lead to explosion. Incompatible with organic materials, strong reducing agents. |
| CAS DataBase Reference | 7789-09-5(CAS DataBase Reference) |
| EPA Substance Registry System | Ammonium dichromate(VI) (7789-09-5) |
SAFETY
Risk and Safety Statements
| Symbol(GHS) |      GHS03,GHS05,GHS06,GHS08,GHS09 |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Signal word | Danger | |||||||||
| Hazard statements | H272-H301-H312-H314-H317-H330-H334-H340-H350-H360-H372-H410 | |||||||||
| Precautionary statements | P210-P260-P280-P303+P361+P353-P304+P340+P310-P305+P351+P338 | |||||||||
| Hazard Codes | E,T+,N | |||||||||
| Risk Statements | 45-46-60-61-2-8-21-25-26-34-42/43-48/23-50/53 | |||||||||
| Safety Statements | 53-45-60-61 | |||||||||
| RIDADR | UN 1439 5.1/PG 2 | |||||||||
| WGK Germany | 3 | |||||||||
| RTECS | HX7650000 | |||||||||
| Autoignition Temperature | 218°C | |||||||||
| TSCA | Yes | |||||||||
| HazardClass | 5.1 | |||||||||
| PackingGroup | II | |||||||||
| HS Code | 28415000 | |||||||||
| Hazardous Substances Data | 7789-09-5(Hazardous Substances Data) | |||||||||
| Toxicity | LDLo scu-gpg: 25 mg/kg EQSSDX 1,1,75 | |||||||||
| NFPA 704 |
|
Ammonium dichromate price More Price(10)
| Manufacturer | Product number | Product description | CAS number | Packaging | Price | Updated | Buy |
|---|---|---|---|---|---|---|---|
| Sigma-Aldrich(India) | 450138 | Ammonium dichromate 99.999% trace metals basis | 7789-09-5 | 25G | ₹8692.48 | 2022-06-14 | Buy |
| Sigma-Aldrich(India) | 402826 | Ammonium dichromate ACS reagent, ≥99.5% | 7789-09-5 | 100G | ₹5271.78 | 2022-06-14 | Buy |
| ottokemi | A 2117 | Ammonium dichromate , GR 99%+ | 7789-09-5 | 500gm | ₹1143 | 2022-05-26 | Buy |
| ottokemi | A 2117 | Ammonium dichromate , GR 99%+ | 7789-09-5 | 5kg | ₹9639 | 2022-05-26 | Buy |
| SRL | 67077 | Ammonium Dichromate extrapure AR, ACS, 99.5% | 7789-09-5 | 500Gms | ₹960 | 2022-05-26 | Buy |
Ammonium dichromate Chemical Properties,Uses,Production
Chemical Properties
Ammonium dichromate is a combustible, orange-red crystalline solid which is used in solution.
Occurrence
Bright orange-red monoclinic crystals; odorless; hygroscopic; decomposes at 180°C; density 2.115 g/cm3 at 25°C; readily dissolves in water (26.67 g/100 g at 20°C).
Uses
Ammonium dichromate is used in photo engraving, dye mordant, pigments, pickling, photography, process engraving, lithography, pyrotechnics, glazes for porcelain and china wares. It acts as a catalyst and a source of nitrogen in the laboratory and as the photoactive site. It is also used in the preparation of alizarin and chrome alum. Further, it is used in leather and oil industry for tanning and purification respectively. It is involved in the production of the phosphor raster television screens and other devices.
General Description
Ammonium dichromate is a bright orange red crystalline solid. Ammonium dichromate is readily ignited and burns producing a voluminous green residue. If heated in a closed container, the container may rupture due to the decomposition of the material. Ammonium dichromate may also act as a strong oxidizing agent if mixed with or contaminated with combustible material. Ammonium dichromate is soluble in water.
Air & Water Reactions
Water soluble.
Reactivity Profile
Ammonium dichromate is an oxidizing reagent, Ammonium dichromate readily reacts with reducing materials, in large quantity Ammonium dichromate may produce a violent reaction. Direct exposure to heat or shock will explode it. When heated to decomposition Ammonium dichromate emits toxic fumes of ammonia and nitrogen oxides [Sax, 9th ed., 1996, p. 205].
Hazard
Dusts and solutions are toxic, irritating to eyes and skin; dangerous fire risk. Strong oxidizing agent may explode in contact with organic materi- als. TLV: 0.05 mg(Cr)/m 3 ; Confirmed human car- cinogen.
Health Hazard
Inhalation causes irritation or ulceration of the mucous membranes of the nose, throat or respiratory tract. Respiratory irritation can produce symptoms resembling those of asthma. Continuing irritation of the nose may lead to perforation of the nasal septum. External contact can cause eye irritation and conjunctivitis, irritation and ulceration of skin wounds, and rash or external ulcers. If ingested, irritates mucous membrane and causes vomiting.
Safety Profile
Confirmed human carcinogen. Poison by inhalation, ingestion, skin contact, and subcutaneous routes. See also CHROMIUM COMPOUNDS. An unstable oxidizer. Moderately flammable; reacts with reducing agents.
Potential Exposure
It is used in dyeing, leather tanning and to make fireworks and chromic oxide; in lithography and photoengraving; in manufacture of special mordants and catalysts.
Shipping
UN1439 Ammonium dichromate, Hazard Class: 5.1; Labels: 5.1-Oxidizer.
Purification Methods
It crystallises from weak aqueous HCl (ca 1mL/g). It decomposes rapidly on heating. (Possible carcinogen and is POISONOUS)
Incompatibilities
An unstable oxidizer; freezing/melting point5(decomposes below MP) 180 C; decomposition becomes self-sustaining and violent at about 225 C. Contact with combustible, organic or other easily oxidized materials, strong acids; hydrazine and other reducing agents; alcohols, sodium nitrite may cause fire and explosions.
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. Add a large volume of a reductant solution (hypo, bisulfite or ferrous salt and acidify with sulfuric acid). Neutralize when reduction is complete and flush to sewer with large volume of water.
Ammonium dichromate Preparation Products And Raw materials
Raw materials
Preparation Products
| Supplier | Tel | Country | ProdList | Advantage | Inquiry |
|---|---|---|---|---|---|
| Choice Chemicals | +91-9895031268 +91-9895031268 | Kerela, India | 118 | 58 | Inquiry |
| JSK Chemicals | +919879767970 | Gujarat, India | 3756 | 58 | Inquiry |
| Merck Ltd | +91-2262109800 +91-2262109000 | Maharashtra, India | 272 | 58 | Inquiry |
| Nithyasri Chemicals (APURVA CHEMICALS) | +91-2512692130 +91-9323652199 | Maharashtra, India | 75 | 58 | Inquiry |
| Desicca Chemicals | +91-7777090620 +91-9821128366 | Maharashtra, India | 20 | 58 | Inquiry |
| Maas Pharma Chemicals | +91-9958666224 | Delhi, India | 1607 | 58 | Inquiry |
| Otto Chemie Pvt. Ltd. | +91 9820041841 | Mumbai, India | 5870 | 58 | Inquiry |
| Sisco Research Laboratories Pvt. Ltd. | +91-22-4268 5800 | Mumbai, India | 4315 | 58 | Inquiry |
| Alfa Aesar | 1 800 209 7001 | Maharashtra, India | 6905 | 58 | Inquiry |
| LOBA CHEMIE PVT.LTD. | 91-22-6663 6699 | Mumbai, India | 3075 | 58 | Inquiry |
| Supplier | Advantage |
|---|---|
| Choice Chemicals | 58 |
| JSK Chemicals | 58 |
| Merck Ltd | 58 |
| Nithyasri Chemicals (APURVA CHEMICALS) | 58 |
| Desicca Chemicals | 58 |
| Maas Pharma Chemicals | 58 |
| Otto Chemie Pvt. Ltd. | 58 |
| Sisco Research Laboratories Pvt. Ltd. | 58 |
| Alfa Aesar | 58 |
| LOBA CHEMIE PVT.LTD. | 58 |
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