Potassium Dichromate - Technical Grade

Product Identifier

Potassium Dichromate - Technical Grade

Grade

Technical

CAS Number

7778-50-9

Chemical Formula

Cr2K2O7

Molecular Weight

294.18 g/mol

Manufacturer

Alliance Chemical
204 South Edmond Street, Taylor, TX 76574

Emergency Phone

Chemtel 1-800-255-3924 (24/7)

Recommended Use

Industrial / laboratory chemical. See Section 7.

Restrictions on Use

No restrictions identified beyond the conditions of safe use in Sections 7 and 8.

Classification

• Oxidizing solids
• Acute toxicity (oral), Category 3
• Acute toxicity (dermal), Category 4
• Skin corrosion/irritation, Category 1
• Serious eye damage/eye irritation, Category 1
• Skin sensitization, Category 1
• Acute toxicity (inhalation)
• Respiratory sensitization, Category 1
• Germ cell mutagenicity, Category 1
• Carcinogenicity, Category 1
• Reproductive toxicity, Category 1
• Specific target organ toxicity, repeated exposure, Category 1
• Hazardous to the aquatic environment, acute hazard, Category 1 †
• Hazardous to the aquatic environment, long-term hazard, Category 1 †

† GHS environmental hazard class; not adopted under OSHA HCS (29 CFR 1910.1200).

Signal Word

Danger

Hazard Statements

• H272May intensify fire; oxidizer
• H301Toxic if swallowed
• H312Harmful in contact with skin
• H314Causes severe skin burns and eye damage
• H317May cause an allergic skin reaction
• H330Fatal if inhaled
• H334May cause allergy or asthma symptoms or breathing difficulties if inhaled
• H340May cause genetic defects
• H350May cause cancer
• H360FDMay damage fertility. May damage the unborn child.
• H372Causes damage to organs through prolonged or repeated exposure
• H400Very toxic to aquatic life
• H410Very toxic to aquatic life with long lasting effects

Precautionary Statements

• P201Obtain special instructions before use.
• P202Do not handle until all safety precautions have been read and understood.
• P210Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
• P220Keep away from clothing and other combustible materials.
• P233Keep container tightly closed.
• P260Do not breathe dust, fume, gas, mist, vapors or spray.
• P261Avoid breathing dust, fume, gas, mist, vapors or spray.
• P264Wash hands and face thoroughly after handling.
• P270Do not eat, drink or smoke when using this product.
• P271Use only outdoors or in a well-ventilated area.
• P272Contaminated work clothing should not be allowed out of the workplace.
• P273Avoid release to the environment.
• P280Wear protective gloves, protective clothing, and eye/face protection.
• P284Wear respiratory protection.
• P301+P310IF SWALLOWED: Immediately call a POISON CENTER or doctor.
• P301+P330+P331IF SWALLOWED: Rinse mouth. Do NOT induce vomiting.
• P302+P352IF ON SKIN: Wash with plenty of water and soap.
• P303+P361+P353IF ON SKIN (or hair): Take off immediately all contaminated clothing. Rinse skin with water or shower.
• P304+P340IF INHALED: Remove person to fresh air and keep comfortable for breathing.
• P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
• P308+P313IF exposed or concerned: Get medical advice or attention.
• P310Immediately call a POISON CENTER or doctor.
• P313Get medical advice or attention.
• P314Get medical advice or attention if you feel unwell.
• P320Specific treatment is urgent (see first-aid information on this label).
• P321Specific treatment (see first-aid information on this label).
• P330Rinse mouth.
• P333+P313If skin irritation or rash occurs: Get medical advice or attention.
• P342+P311If experiencing respiratory symptoms: Call a POISON CENTER or doctor.
• P362Take off contaminated clothing and wash before reuse.
• P363Wash contaminated clothing before reuse.
• P370+P378In case of fire: Use water spray or fog in large quantities to extinguish.
• P391Collect spillage.
• P403Store in a well-ventilated place.
• P403+P233Store in a well-ventilated place. Keep container tightly closed.
• P405Store locked up.
• P501Dispose of contents and container in accordance with local, regional, national, and international regulations.

Classification, hazard (H) and precautionary (P) statements and pictograms per OSHA HCS 2024 (29 CFR 1910.1200, Appendices A–C), aligned with GHS Rev. 7.

Concentrations are nominal; lot-specific values appear on the Certificate of Analysis. Components not contributing to classification are omitted.

Eyes

Rinse with plenty of water for at least 15 minutes. Remove contact lenses if present and easy to do. Continue rinsing. Seek medical attention immediately.

Skin

Immediately flush with plenty of water for at least 15 minutes while removing contaminated clothing. Wash with soap. Get medical attention immediately.

Inhalation

Move person to fresh air and keep comfortable for breathing. If breathing is difficult, give oxygen. If not breathing, give artificial respiration. Get medical attention immediately.

Ingestion

Do Not Induce Vomiting! Never give anything by mouth to an unconscious person. If conscious, wash out mouth with water. Get medical attention immediately.

Most Important Symptoms and Effects

• Causes burns to the skin, eyes and mucous membranes; eye contact may cause permanent damage including blindness; ingestion burns the mouth, throat and stomach.
• May cause an allergic skin reaction (rash, itching), which can be delayed and recur on later exposure.
• Inhalation may cause allergy or asthma symptoms (wheezing, chest tightness, shortness of breath), which can be delayed.
• Ingestion may cause nausea, vomiting and abdominal pain; larger amounts may cause systemic poisoning.
• Absorption through the skin may cause systemic poisoning.
• Inhalation may cause coughing, shortness of breath and headache; high concentrations may cause systemic poisoning.

Immediate Medical Attention and Special Treatment

• Immediate medical attention is required after eye or skin contact or ingestion; tissue damage may continue after exposure ends.
• Get immediate medical attention after any significant exposure; symptoms may be delayed.

Suitable Extinguishing Media

Water spray or fog in large quantities. Do NOT use dry chemical or CO2.

Unsuitable Extinguishing Media

Do not use dry chemical, CO2, or foam.

Specific Hazards Arising from the Chemical

Oxidizer: may intensify fire and ignite combustible materials (wood, paper, oil). Fire may release corrosive and toxic gases. Containers may rupture when heated.

Protective Equipment

Wear self-contained breathing apparatus and full protective clothing.

Hazardous Combustion Products

Potassium oxides and chromium oxides (including hexavalent chromium), with corrosive vapors, on thermal decomposition.

Personal Precautions

Use PPE as described in Section 8. Ensure adequate ventilation. Evacuate personnel to safe areas.

Hazard-Specific Precautions

Keep away from combustible materials. Do not absorb with sawdust, paper or other combustible absorbents. Do not touch spilled material without protective equipment. Neutralize residue only with a method suitable for the material, then collect.

Environmental Precautions

Prevent leakage or spillage from entering drains, sewers, or waterways.

Containment & Cleanup

Absorb with inert material. Collect in appropriate waste container. Dispose per applicable regulations.

Safe Handling

Use with adequate ventilation. Avoid contact with skin, eyes, and clothing. Wash thoroughly after handling. Keep container closed when not in use.

Safe Storage

Store in a cool, dry, well-ventilated area. Keep away from incompatible materials (see Section 10). Keep containers tightly closed.

Specific Storage Precautions

Keep containers tightly closed in a cool, dry, well-ventilated place, locked up, away from combustible materials, heat, ignition sources and incompatible materials; protect from moisture. Handle in a fume hood or closed system and minimize dust.

Occupational Exposure Limits

Engineering Controls

Use adequate ventilation. Provide eyewash stations and quick-drench showers accessible to areas of use.

Eye/Face Protection

Wear chemical safety goggles or face shield.

Skin Protection

Wear chemical-resistant gloves and protective clothing.

Respiratory Protection

Use a NIOSH-approved air-purifying respirator with cartridges appropriate for the contaminant. For higher exposures or confined spaces, use supplied-air or a powered air-purifying respirator (PAPR).

Exposure limits sourced from NIOSH Pocket Guide, OSHA 29 CFR 1910.1000 and ACGIH TLVs.

Appearance

Orange-red crystalline powder

Odor

Odorless, no distinctive odor

Odor Threshold

No data available

pH

No data available

Melting Point / Freezing Point

748 °F (NTP, 1992)

Boiling Point

Decomposes at 932 °F (NTP, 1992)

Flash Point

N/A

Evaporation Rate

No data available

Flammability (solid, gas)

No data available

Upper/Lower Flammability or Explosive Limits

No data available

Vapor Pressure

No data available

Vapor Density

No data available

Relative Density

No data available

Solubility

10 to 50 mg/mL at 68 °F (NTP, 1992)

Partition Coefficient (n-octanol/water)

No data available

Auto-ignition Temperature

No data available

Decomposition Temperature

No data available

Viscosity

No data available

Particle Characteristics

No data available

Form

Solid

Density

2.676 at 77 °F (USCG, 1999) - Denser than water; will sink

Values shown reflect product-specific canonical data. Lot-specific ranges may vary; see the Certificate of Analysis for the shipped lot.

Reactivity

Oxidizer: reacts with combustible and reducing materials, which may cause fire.

Chemical Stability

Stable under recommended storage conditions.

Possibility of Hazardous Reactions

None under normal processing conditions.

Conditions to Avoid

Dust formation; heat, sparks and open flame; contact with combustible, organic and reducing materials; prolonged exposure to air or moisture.

Incompatible Materials

Combustible and organic materials; strong reducing agents; powdered metals; acids; bases; hydrazine; hydrocarbons; acid anhydrides.

Hazardous Decomposition Products

Potassium oxides and chromium oxides (including hexavalent chromium), with corrosive vapors, on thermal decomposition.

See Section 2 for GHS hazard classification.

Likely Routes of Exposure

Inhalation, skin contact, eye contact, ingestion.

Symptoms

• Causes burns to the skin, eyes and mucous membranes; eye contact may cause permanent damage including blindness; ingestion burns the mouth, throat and stomach.
• May cause an allergic skin reaction (rash, itching), which can be delayed and recur on later exposure.
• Inhalation may cause allergy or asthma symptoms (wheezing, chest tightness, shortness of breath), which can be delayed.
• Ingestion may cause nausea, vomiting and abdominal pain; larger amounts may cause systemic poisoning.
• Absorption through the skin may cause systemic poisoning.
• Inhalation may cause coughing, shortness of breath and headache; high concentrations may cause systemic poisoning.

Delayed and Chronic Effects

• Carcinogenicity: may cause or is suspected of causing cancer after long-term exposure (see the carcinogen classification below).
• Germ cell mutagenicity: may cause or is suspected of causing genetic defects.
• Reproductive toxicity: may damage or is suspected of damaging fertility or the unborn child.
• Prolonged or repeated exposure may damage organs.
• Sensitization: once sensitized, later exposure to very low levels may cause a reaction.

Numerical Measures of Toxicity

No data available

Carcinogen Classification

Aquatic Hazard

• H400Very toxic to aquatic life
• H410Very toxic to aquatic life with long lasting effects

Ecotoxicity

Classified as hazardous to the aquatic environment (see Section 2); no product-specific ecotoxicity test data on file. Avoid release to the environment.

Persistence & Degradability

Not Available

Bioaccumulative Potential

Not Available

Mobility in Soil

Not Available

Dispose of contents/container in accordance with applicable federal, state, and local regulations. Do not dispose of into drains or waterways.

If discarded, this material may be an ignitable hazardous waste as an oxidizer (EPA RCRA D001, 40 CFR 261.21(a)(4)). If discarded, this material may be a corrosive hazardous waste (EPA RCRA D002, 40 CFR 261.22): aqueous with pH ≤ 2 or ≥ 12.5, or a liquid that corrodes steel at more than 6.35 mm per year. The waste generator must make the final hazardous-waste determination.

US DOT (49 CFR)

UN Number

UN3288

Proper Shipping Name

Toxic solid, inorganic, n.o.s. (Potassium dichromate)

Hazard Class

6.1

Packing Group

III

Environmental Hazards

Meets GHS aquatic-hazard criteria; may be a marine pollutant under the IMDG Code (vessel transport).

IMDG / IATA classifications may differ from US DOT. Verify current regulations before international shipment.

SARA 311/312 hazard categories correspond to the GHS classification in Section 2. Data retrieved as of: California Proposition 65 2026-10-02; US EPA TSCA Active Inventory 2026-10-02; EPCRA SARA 313 (TRI) 2026-10-02.

Revision Date

2026-10-13

Format

16-section format per OSHA HCS 2024 (29 CFR 1910.1200, Appendix D), aligned with GHS Rev. 7.