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Ammonium dichromate
CAS No.: 7789-09-5
Synonyms:
Formula: Cr2H8N2O7
Exact Mass: 251.91400
Molecular Weight: 252.06500
PSA: 124.45000
LogP: -0.24940
Reference Price: $1,935/ton Inquiry Now
Ammonium dichromate 7789-09-5 MSDS
Name: Ammonium dichromate Material Safety Data Sheet
Synonym: Ammonium bichromate; Ammonium dichromate(VI)
CAS: 7789-09-5
Section 1 - Chemical Product   MSDS Name:Ammonium dichromate Material Safety Data Sheet
Synonym:Ammonium bichromate; Ammonium dichromate(VI)

Section 2 - COMPOSITION, INFORMATION ON INGREDIENTS
CAS# Chemical Name content EINECS#
7789-09-5 Ammonium dichromate 99 232-143-1
Hazard Symbols: T+ N E
Risk Phrases: 1 21 25 26 37/38 41 43 46 8 49 50/53

Section 3 - HAZARDS IDENTIFICATION
  EMERGENCY OVERVIEW
Explosive when dry. Harmful in contact with skin. Toxic if swallowed. Very toxic by inhalation. Irritating to respiratory system and skin. Risk of serious damage to eyes. May cause sensitization by skin contact. May cause heritable genetic damage. Contact with combustible material may cause fire. May cause cancer by inhalation.
Very toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment.Cancer suspect agent.
Potential Health Effects
Eye:
May cause severe eye irritation and possible injury.
Skin:
Causes skin irritation. May cause skin sensitization, an allergic reaction, which becomes evident upon re-exposure to this material.
May be harmful if absorbed through the skin.
Ingestion:
Harmful if swallowed.
Inhalation:
May be fatal if inhaled. Causes respiratory tract irritation.
Chronic:
Prolonged or repeated inhalation may cause nosebleeds, nasal congestion, erosion of the teeth, perforation of the nasal septum, chest pain and bronchitis. Prolonged or repeated eye contact may cause conjunctivitis. Prolonged or repeated skin contact may cause sensitization dermatitis and possible destruction and/or ulceration.
May cause liver and kidney damage. May cause cancer in humans.

Section 4 - FIRST AID MEASURES
  Eyes: Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid immediately. Do NOT allow victim to rub eyes or keep eyes closed.
Extensive irrigation with water is required (at least 30 minutes).
Skin:
Get medical aid immediately. Immediately flush skin with plenty of water for at least 15 minutes while removing contaminated clothing and shoes. Wash clothing before reuse. Destroy contaminated shoes.
Ingestion:
Do not induce vomiting. If victim is conscious and alert, give 2-4 cupfuls of milk or water. Never give anything by mouth to an unconscious person. Get medical aid immediately.
Inhalation:
Get medical aid immediately. Remove from exposure and move to fresh air immediately. If breathing is difficult, give oxygen. Do NOT use mouth-to-mouth resuscitation. If breathing has ceased apply artificial respiration using oxygen and a suitable mechanical device such as a bag and a mask.
Notes to Physician:
Persons with asthma, allergies, and know sensitization to chromic acid or chromates may be at increased risk from exposure to this product. Effects may be delayed. For methemoglobinemia, administer oxygen alone or with Methylene Blue depending on the methemoglobin concentration in the blood.

Section 5 - FIRE FIGHTING MEASURES
  General Information:
As in any fire, wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Strong oxidizer. Contact with other material may cause fire. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. Use water with caution and in flooding amounts. This material poses an explosion hazard when dry.
Extinguishing Media:
Use water only! Contact professional fire-fighters immediately. Cool containers with flooding quantities of water until well after fire is out. For large fires, flood fire area with water from a distance. Do NOT use dry chemicals, CO2, Halon or foams.

Section 6 - ACCIDENTAL RELEASE MEASURES
  General Information: Use proper personal protective equipment as indicated in Section 8.
Spills/Leaks:
Vacuum or sweep up material and place into a suitable disposal container. Clean up spills immediately, observing precautions in the Protective Equipment section. Avoid generating dusty conditions.
Remove all sources of ignition. Wet area to prevent drying out.
Provide ventilation. Do not use combustible materials such as paper towels to clean up spill. Keep combustibles (wood, paper, oil, etc.,) away from spilled material.

Section 7 - HANDLING and STORAGE
  Handling:
Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Use only in a well-ventilated area. Minimize dust generation and accumulation. Do not get in eyes, on skin, or on clothing. Empty containers retain product residue, (liquid and/or vapor), and can be dangerous. Keep container tightly closed. Do not ingest or inhale. Do not store near combustible materials. Discard contaminated shoes. Do not pressurize, cut, weld, braze, solder, drill, grind, or expose empty containers to heat, sparks or open flames.
Storage:
Keep away from heat, sparks, and flame. Keep away from sources of ignition. Do not store near combustible materials. Keep container closed when not in use. Store in a cool, dry, well-ventilated area away from incompatible substances. Keep away from acids. Keep away from reducing agents.

Section 8 - EXPOSURE CONTROLS, PERSONAL PROTECTION
  Engineering Controls:
Facilities storing or utilizing this material should be equipped with an eyewash facility and a safety shower. Use adequate ventilation to keep airborne concentrations low.
Exposure Limits CAS# 7789-09-5: United Kingdom, WEL - TWA: (listed as chromium (vi) compounds): 0 mg/m3 TWA (as Cr) United Kingdom, WEL - STEL: (listed as chromium (vi) compounds): mg/m3 STEL (as Cr) United States OSHA: 0.1 mg/m3 Ceiling (listed under Chromates).
Belgium - TWA: (listed as chromium (vi) compounds- water soluble) 0.05 mg/m3 VLE (as Cr) France - VME: (listed as chromium (vi) compounds): 0.05 mg/m3 VME Cr) Germany: (listed as chromium (vi) compounds): 0.05 mg/m3 VME (as Japan: (listed as chromium (vi) compounds): 0.05 mg/m3 OEL (as Cr 0.01 mg/m3 OEL (certain compounds, as Cr) Malaysia: (listed as chromium (vi) compounds- water soluble): 0.0 mg/m3 TWA (as Cr) Netherlands: (listed as chromium (vi) compounds- water soluble): mg/m3 STEL Netherlands: (listed as chromium (vi) compounds- water soluble): 0.025 mg/m3 MAC Spain: 0.05 mg/m3 VLA-ED (as Cr) Personal Protective Equipment Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166.
Skin:
Wear appropriate protective gloves to prevent skin exposure.
Clothing:
Wear appropriate protective clothing to prevent skin exposure.
Respirators:
A respiratory protection program that meets OSHA's 29 CFR 1910.134 and ANSI Z88.2 requirements or European Standard EN 149 must be followed whenever workplace conditions warrant respirator use.

Section 9 - PHYSICAL AND CHEMICAL PROPERTIES
 
Physical State: Crystals
Color: orange to red
Odor: odorless
pH: 3.45 for 10% soln.
Vapor Pressure: Not available.
Viscosity: Not available.
Boiling Point: Not available.
Freezing/Melting Point: 170 deg C (dec)
Autoignition Temperature: 225 deg C ( 437.00 deg F)
Flash Point: Not available.
Explosion Limits, lower: Not available.
Explosion Limits, upper: Not available.
Decomposition Temperature: 170 deg C
Solubility in water: Soluble.
Specific Gravity/Density: 2.1500
Molecular Formula: (NH4)2Cr2O7
Molecular Weight: 252.06

Section 10 - STABILITY AND REACTIVITY
  Chemical Stability:
Stable. However, may decompose if heated.
Conditions to Avoid:
Ignition sources, dust generation, excess heat.
Incompatibilities with Other Materials:
Reducing agents, strong acids, alcohols, aluminum, hydrazine, plastics, potassium chlorates, sodium nitrate, sulfur, combustible organics, carbides, wood.
Hazardous Decomposition Products:
Oxides of nitrogen, toxic chromium oxide fumes.
Hazardous Polymerization: Will not occur.

Section 11 - TOXICOLOGICAL INFORMATION
  RTECS#:
CAS# 7789-09-5: HX7650000 HX7660000 LD50/LC50:
Not available.
Oral, rat: LD50 = 67.5 mg/kg.
mg/l/4H.
Carcinogenicity:
Ammonium dichromate - California: carcinogen, initial date 2/27/87 (listed as Chromium (VI) NTP: Known carcinogen (listed as Chromium (VI) compounds).
IARC: Group 1 carcinogen (listed as Chromium (VI) compounds).
Other:
See actual entry in RTECS for complete information.

Section 12 - ECOLOGICAL INFORMATION
  Ecotoxicity:
Fish: Mosquito Fish: LC50 = 136 mg/L; 96 Hr; UnspecifiedFish: Mosquito Fish: LC50 = 212 mg/L; 48 Hr; UnspecifiedChromium in soil can be transported to the atmosphere by way of aerosol formation.
Chromium is also transported from soil through runoff and leaching of water. Runoff could remove both chromium ions and bulk precipitates of chromium, with final deposition on either a different land area or a water body. Chromium is present usually as Cr(III) in the soil and is characterized by its lack of mobility, except in cases where Cr(VI) is involved. Chromium(VI) of natural origin is rarely found.

Section 13 - DISPOSAL CONSIDERATIONS
  Dispose of in a manner consistent with federal, state, and local regulations.

Section 14 - TRANSPORT INFORMATION
 
IATA
Shipping Name: AMMONIUM DICHROMATE
Hazard Class: 5.1
UN Number: 1439
Packing Group: II
IMO
Shipping Name: AMMONIUM DICHROMATE
Hazard Class: 5.1
UN Number: 1439
Packing Group: II
RID/ADR
Shipping Name: AMMONIUM DICHROMATE
Hazard Class: 5.1
UN Number: 1439
Packing group: II
USA RQ: CAS# 7789-09-5: 10 lb final RQ; 4.54 kg final RQ

Section 15 - REGULATORY INFORMATION
 
European/International Regulations
European Labeling in Accordance with EC Directives
Hazard Symbols: T+ N E
Risk Phrases:
R 46 May cause heritable genetic damage.
R 49 May cause cancer by inhalation.
R 1 Explosive when dry.
R 21 Harmful in contact with skin.
R 25 Toxic if swallowed.
R 26 Very toxic by inhalation.
R 37/38 Irritating to respiratory system and skin.
R 41 Risk of serious damage to eyes.
R 43 May cause sensitization by skin contact.
R 50/53 Very toxic to aquatic organisms, may cause
long-term adverse effects in the aquatic environment.
R 8 Contact with combustible material may cause
fire.
Safety Phrases:
S 53 Avoid exposure - obtain special instructions
before use.
S 45 In case of accident or if you feel unwell, seek
medical advice immediately (show the label where
possible).
S 60 This material and its container must be
disposed of as hazardous waste.
S 61 Avoid release to the environment. Refer to
special instructions/safety data sheets.
WGK (Water Danger/Protection)
CAS# 7789-09-5: 3
Canada
CAS# 7789-09-5 is listed on Canada's DSL List.
CAS# 7789-09-5 is listed on Canada's Ingredient Disclosure List.
US FEDERAL
TSCA
CAS# 7789-09-5 is listed on the TSCA inventory.


SECTION 16 - ADDITIONAL INFORMATION
N/A

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