Ammonium Dichromate

Synonyms: Dichromic acid, diammonium salt; ammonium bichromate



Molecular Formula


Molecular Weight



Orange Red Crystalline Powder


Technical *



98.0% MIN

*Also available Pure, LR, AR and ACS Grade

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Material Safety Data Sheet

Ammonium Dichromate


Section 1: Chemical Product and Company Identification


Chemical Name: Ammonium Dichromate


CAS#: 7789-09-5

RTECS: HX7650000

TSCA: TSCA 8(b) inventory: Ammonium dichromate

CI#: Not available.

Synonym: Ammonium Bichromate; Dichromic acid,

diammonium salt

Chemical Formula: (NH4)2Cr2O7



Contact Information:


Vishnupriya Chemicals Pvt. Ltd.


Office No. 7, Meridian apartments

Lake Hills Road, New MLA Quarters

Basheerbagh, Hyderabad 63,  A.P

Tel :  040 - 23225550

Fax : 040 23223177

Email :

Website :


Section 2: Composition and Information on Ingredients






% by Weight

Ammonium Dichromate




Toxicological Data on Ingredients: Ammonium dichromate LD50: Not available. LC50: Not available.


Section 3: Hazards Identification


Potential Acute Health Effects:

Hazardous in case of skin contact (irritant), of eye contact (irritant), of ingestion, of inhalation. Slightly hazardous in case of skin contact (permeator). Prolonged exposure may result in skin burns and ulcerations. Over-exposure by inhalation may cause respiratory irritation. Severe over-exposure can result in death.


Potential Chronic Health Effects:

Hazardous in case of skin contact (permeator).

CARCINOGENIC EFFECTS: Classified A1 (Confirmed for human.) by ACGIH, 1 (Proven for human.) by IARC.

MUTAGENIC EFFECTS: Mutagenic for bacteria and/or yeast.



The substance may be toxic to blood, kidneys, liver.

Repeated or prolonged exposure to the substance can produce target organs damage. Repeated exposure to a highly

toxic material may produce general deterioration of health by an accumulation in one or many human organs.


Section 4: First Aid Measures


Eye Contact:

Check for and remove any contact lenses. In case of contact, immediately flush eyes with plenty of water for at

least 15 minutes. Cold water may be used. Get medical attention.


Skin Contact:

In case of contact, immediately flush skin with plenty of water for at least 15 minutes while removing contaminated

clothing and shoes. Cover the irritated skin with an emollient. Cold water may be used.Wash clothing before

reuse. Thoroughly clean shoes before reuse. Get medical attention immediately.


Serious Skin Contact:

Wash with a disinfectant soap and cover the contaminated skin with an anti-bacterial cream. Seek immediate

medical attention.



If inhaled, remove to fresh air. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get

medical attention immediately.


Serious Inhalation:

Evacuate the victim to a safe area as soon as possible. Loosen tight clothing such as a collar, tie, belt or

waistband. If breathing is difficult, administer oxygen. If the victim is not breathing, perform mouth-to-mouth

resuscitation. WARNING: It may be hazardous to the person providing aid to give mouth-to-mouth resuscitation

when the inhaled material is toxic, infectious or corrosive. Seek immediate medical attention.



If swallowed, do not induce vomiting unless directed to do so by medical personnel. Never give anything by

mouth to an unconscious person. Loosen tight clothing such as a collar, tie, belt or waistband. Get medical

attention immediately.


Serious Ingestion: Not available.


Section 5: Fire and Explosion Data


Flammability of the Product: May be combustible at high temperature.


Auto-Ignition Temperature: 190C (374F)


Flash Points: Not available.


Flammable Limits: Not available.


Products of Combustion: Some metallic oxides.


Fire Hazards in Presence of Various Substances:

Slightly flammable to flammable in presence of heat.

Non-flammable in presence of shocks.


Explosion Hazards in Presence of Various Substances:

Risks of explosion of the product in presence of mechanical impact: Not available.

Explosive in presence of open flames and sparks, of heat.


Fire Fighting Media and Instructions:

Oxidizing material.

Do not use water jet. Use flooding quantities of water. Avoid contact with organic materials.


Special Remarks on Fire Hazards:

May ignite by friction with carbide.

In contact with substances which are readilty oxidized, these can react rapidly enough to cause ignition.


Special Remarks on Explosion Hazards:

Hydrazine is decomposed explosively by chromates.

With finely divided oxidizable substances, combustion can be violent.

Closed containers readily rupture at decompositon temperature.


Section 6: Accidental Release Measures


Small Spill:

Use appropriate tools to put the spilled solid in a convenient waste disposal container. If necessary: Neutralize the residue with a dilute solution of sodium carbonate.


Large Spill:

Oxidizing material. Poisonous solid.

Stop leak if without risk. Do not get water inside container. Avoid contact with a combustible material (wood, paper, oil, clothing...). Keep substance damp using water spray. Do not touch spilled material. Use water spray to reduce vapors. Prevent entry into sewers, basements or confined areas; dike if needed. Eliminate all ignition sources. Call for assistance on disposal. Neutralize the residue with a dilute solution of sodium carbonate. Be careful that the product is not present at a concentration level above TLV. Check TLV on the MSDS and with local authorities.


Section 7: Handling and Storage



Keep locked up.. Keep away from heat. Keep away from sources of ignition. Keep away from combustible material.. Empty containers pose a fire risk, evaporate the residue under a fume hood. Ground all equipment containing material. Do not ingest. Do not breathe dust. Wear suitable protective clothing. In case of insufficient ventilation, wear suitable respiratory equipment. If ingested, seek medical advice immediately and show the container or the label. Avoid contact with skin and eyes. Keep away from incompatibles such as combustible materials, organic materials, acids, alkalis.



Keep container tightly closed. Keep container in a cool, well-ventilated area. Separate from acids, alkalies, reducing agents and combustibles. See NFPA 43A, Code for the Storage of Liquid and Solid Oxidizers. Do not store above 24C (75.2F).


Section 8: Exposure Controls/Personal Protection


Engineering Controls:

Use process enclosures, local exhaust ventilation, or other engineering controls to keep airborne levels below recommended exposure limits. If user operations generate dust, fume or mist, use ventilation to keep exposure to airborne contaminants below the exposure limit.


Personal Protection:

Splash goggles. Lab coat. Dust respirator. Be sure to use an approved/certified respirator or equivalent. Gloves.


Personal Protection in Case of a Large Spill:

Splash goggles. Full suit. Dust respirator. Boots. Gloves. A self contained breathing apparatus should be used to avoid inhalation of the product. Suggested protective clothing might not be sufficient; consult a specialist BEFORE handling this product.


Exposure Limits:

TWA: 0.05 (mg (Cr)/m) from ACGIH (TLV) [United States]

Consult local authorities for acceptable exposure limits.


Section 9: Physical and Chemical Properties


Physical state and appearance: Solid. (Crystals solid.)


Odor: Odorless.


Taste: Not available.


Molecular Weight: 252.1 g/mole


Color: Orange. Red.


pH (1% soln/water): 3.95 [Acidic.]


Boiling Point: Not available.


Melting Point: Not available.


Critical Temperature: Not available.


Specific Gravity: 2.155 (Water = 1)


Vapor Pressure: Not applicable.


Vapor Density: 8.7(Air = 1)


Volatility: Not available.


Odor Threshold: Not available.


Water/Oil Dist. Coeff.: Not available.


Ionicity (in Water): Not available.


Dispersion Properties: See solubility in water.



Soluble in cold water, hot water.

Insoluble in acetone.

Soluble in alcohol.


Section 10: Stability and Reactivity Data


Stability: Unstable.


Instability Temperature: Not available.


Conditions of Instability: Excess heat and incompatible materials


Incompatibility with various substances:

Reactive with combustible materials, organic materials, acids, alkalis.

Slightly reactive to reactive with moisture.


Corrosivity: Not available.


Special Remarks on Reactivity:

It is an oxidizing material and combustible solid. Decomposes vigorously with luminescence around 200 C.

Decomposes at about 180 C. Decomposition becomes self-sustaining at about 225 C with swelling and evolution of heat and nitrogen.

It is incompatible with combustible, organic, or other readily oxidizable materials: Paper, wood, sulfur, aluminum, plastics, acids, bases, potassium chlorate, sodium nitrite, alcohols, ethylene glycol, water.


Special Remarks on Corrosivity: Not available.


Polymerization: Will not occur.


Section 11: Toxicological Information


Routes of Entry: Absorbed through skin. Inhalation. Ingestion.


Toxicity to Animals:

LD50: Not available.

LC50: Not available.


Chronic Effects on Humans:

CARCINOGENIC EFFECTS: Classified A1 (Confirmed for human.) by ACGIH, 1 (Proven for human.) by IARC.

MUTAGENIC EFFECTS: Mutagenic for bacteria and/or yeast.

May cause damage to the following organs: blood, kidneys, liver.


Other Toxic Effects on Humans:

Hazardous in case of skin contact (irritant), of ingestion, of inhalation.

Slightly hazardous in case of skin contact (permeator).


Special Remarks on Toxicity to Animals:

Lowest Published Lethal Dose

LDL [Child] - Route: Oral; Dose: 99 mg/kg


Special Remarks on Chronic Effects on Humans: Not available.


Special Remarks on other Toxic Effects on Humans:

Acute Potential Health Effects:

Skin: Causes skin irritation. May be absorbed through skin

Eyes: Causes eye irritation.

Inhalation: Causes respiratory tract and mucous membrane irritation. It may destructive to the tissues of the mucous membranes

Ingestion: May cause intense gastrointestinal tract irritation. May affect blood, Kidneys (urinary system), and liver. Symptoms of acute poisoning may include ulceration and corrosion, epigastric pain, nausea, vomiting, diarrhea, vertigo, fever, muscle cramps, hemorrhagic diathesis, toxic nephritis, renal failure, intravascular hemolysis, circulatory collapse, liver damage, peripheral vascular collapse, acute multisystem shock and coma, and even death depending on the dose.

Chronic Potential Health Effects:

Chronic poisoning usually results from inhalation or skin contact.

May affect the blood, kidneys and liver.

Signs and symptoms may include lacrimation, dermatitis, penetrating ulcers, perforation of nasal septum, pulmonary edema, congestion, chronic rhinitis, polyps of the upper respiratory tract, inflammation of the lung, emphysema, tracheitis, bronchitis, pharyngitis, adhesions of the diaphragm, inflammation of larynx, conjunctivitis, loss of appetite, nausea, vomiting, inflammation of liver or even acute hepatitis with jaundice, respiratory irritations, leukocytosis, leukopenia, monocytosis, and eosinophilia.


Section 12: Ecological Information


Ecotoxicity: Not available.


BOD5 and COD: Not available.


Products of Biodegradation: Possibly hazardous short/long term degradation products are to be expected.


Toxicity of the Products of Biodegradation: The products of degradation are less toxic than the product itself.


Special Remarks on the Products of Biodegradation: Not available.


Section 13: Disposal Considerations


Waste Disposal:

Waste must be disposed of in accordance with federal, state and local environmental control regulations.





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