Synonyms: potassium chromate
CAS No.: 7789-00-6
Molecular Weight: 194.19
Chemical Formula: K2CrO4
Ingredient CAS No Percent Hazardous
--------------------------------------- ------------ ------------
Potassium Chromate 7789-00-6 99 - 100% Yes
Inhalation: Corrosive. Extremely destructive to tissues of the mucous
membranes and upper respiratory tract. May cause ulceration and perforation of
the nasal septum. Symptoms may include sore throat, coughing, shortness of
breath, and labored breathing. May produce pulmonary sensitization or allergic
asthma. Higher exposures may cause pulmonary edema.
Ingestion: Corrosive. Swallowing can cause severe burns of the mouth, throat, and stomach, leading to death. Can cause sore throat, vomiting, diarrhea. May cause violent gastroenteritis, peripheral vascular collapse, dizziness, intense thirst, muscle cramps, shock, coma, abnormal bleeding, fever, liver damage and acute renal failure.
Skin Contact: Corrosive. Symptoms of redness, pain, and severe burn can occur. Dusts and strong solutions may cause severe irritation. Contact with broken skin may cause ulcers (chrome sores) and absorption, which may cause systemic poisoning, affecting kidney and liver functions. May cause skin sensitization.
Eye Contact: Corrosive. Contact can cause blurred vision, redness, pain and severe tissue burns. May cause corneal injury or blindness.
Chronic Exposure: Repeated or prolonged exposure can cause ulceration and perforation of the nasal septum, respiratory irritation, liver and kidney damage and ulceration of the skin. Ulcerations at first may be painless, but may penetrate to the bone producing "chrome holes." Known to be a human carcinogen.
Aggravation of Pre-existing Conditions: Persons with pre-existing skin disorders, asthma, allergies or known sensitization to chromic acid or chromates may be more susceptible to the effects of this material.
Inhalation: Remove to fresh air. If not breathing,
give artificial respiration. If breathing is difficult, give oxygen. Get medical
Ingestion: If swallowed, DO NOT INDUCE VOMITING. Give large quantities of water. Never give anything by mouth to an unconscious person. Get medical attention immediately.
Skin Contact: Immediately flush skin with plenty of water for at least 15 minutes while removing contaminated clothing and shoes. Get medical attention immediately. Wash clothing before reuse. Thoroughly clean shoes before reuse.
Eye Contact: Immediately flush eyes with plenty of water for at least 15 minutes, lifting lower and upper eyelids occasionally. Get medical attention immediately.
Fire: Not combustible, but substance is a strong
oxidizer and its heat of reaction with reducing agents or combustibles may cause
ignition. Releases oxygen, upon decomposition, which enhances combustion.
Explosion: Contact with oxidizable substances may cause extremely violent combustion. Becomes a possible explosion hazard when shocked, heated, or exposed to hydrazine.
Fire Extinguishing Media: Flood with large amounts of water. Water spray may be used to keep fire exposed containers cool. Do not allow water runoff to enter sewers or waterways.
Special Information: In the event of a fire, wear full protective clothing and NIOSH-approved self-contained breathing apparatus with full facepiece operated in the pressure demand or other positive pressure mode.
Ventilate area of leak or
spill. Wear appropriate personal protective equipment as specified in Section 8.
Keep in a tightly closed container. Protect from physical damage. Store in a cool, dry, ventilated area away from sources of heat, moisture and incompatibilities. Do not store on wooden floors. Wear special protective equipment (Sec. 8) for maintenance break-in or where exposures may exceed established exposure levels. Wash hands, face, forearms and neck when exiting restricted areas. Shower, dispose of outer clothing, change to clean garments at the end of the day. Avoid cross-contamination of street clothes. Wash hands before eating and do not eat, drink, or smoke in workplace. Containers of this material may be hazardous when empty since they retain product residues (dust, solids); observe all warnings and precautions listed for the product.
Airborne Exposure Limits: - OSHA Permissible
Exposure Limit (PEL):
For chromic acid and chromates, as CrO3 = 0.1 mg/m3 (ceiling)
- ACGIH Threshold Limit Value (TLV):
For water-soluble Cr(VI) compounds, as Cr = 0.05 mg/m3 (TWA), A1 - confirmed human carcinogen.
Ventilation System: A system of local and/or general exhaust is recommended to keep employee exposures below the Airborne Exposure Limits. Local exhaust ventilation is generally preferred because it can control the emissions of the contaminant at its source, preventing dispersion of it into the general work area. Please refer to the ACGIH document, Industrial Ventilation, A Manual of Recommended Practices, most recent edition, for details.
Personal Respirators (NIOSH Approved): If the exposure limit is exceeded and engineering controls are not feasible, a half facepiece particulate respirator (NIOSH type N95 or better filters) may be worn for up to ten times the exposure limit or the maximum use concentration specified by the appropriate regulatory agency or respirator supplier, whichever is lowest.. A full-face piece particulate respirator (NIOSH type N100 filters) may be worn up to 50 times the exposure limit, or the maximum use concentration specified by the appropriate regulatory agency, or respirator supplier, whichever is lowest. If oil particles (e.g. lubricants, cutting fluids, glycerine, etc.) are present, use a NIOSH type R or P filter. For emergencies or instances where the exposure levels are not known, use a full-facepiece positive-pressure, air-supplied respirator. WARNING: Air-purifying respirators do not protect workers in oxygen-deficient atmospheres.
Skin Protection: Wear impervious protective clothing, including boots, gloves, lab coat, apron or coveralls, as appropriate, to prevent skin contact.
Eye Protection: Use chemical safety goggles and/or full face shield where dusting or splashing of solutions is possible. Maintain eye wash fountain and quick-drench facilities in work area.
Appearance: Yellow crystals.
Solubility: 69.9g/100 g water @ 20C (68F).
pH: Aqueous soln. is alkaline to litmus.
% Volatiles by volume @ 21C (70F): 0
Boiling Point: No information found.
Melting Point: 975C (1787F)
Vapor Density (Air=1): 6.7
Vapor Pressure (mm Hg): Zero.
Evaporation Rate (BuAc=1): No information found.
Stability: Stable under ordinary conditions of use
Hazardous Decomposition Products: Burning may produce chrome oxides.
Hazardous Polymerization: Will not occur.
Incompatibilities: Reducing agents, hydrazine, and flammable materials. Any combustible, organic or other readily oxidizable material (paper, wood, sulfur, aluminum or plastics).
Conditions to Avoid: Heat, incompatibles.
Oral rat LD50: 180 mg/kg. Investigated as a tumorigen, mutagen, reproductive effector.
Ingredient Known Anticipated IARC Category
------------------------------------ ----- ----------- ------
Potassium Chromate (7789-00-6) Yes No 1
Environmental Fate: When released into the soil,
this material may leach into groundwater. When released into water, this
material is not expected to evaporate significantly. This material may
bioaccumulate to some extent. When released into the air, this material may be
removed from the atmosphere to a moderate extent by wet deposition.
Environmental Toxicity: Dangerous to the environment. Very toxic to aquatic organisms; may cause long term adverse effects in the aquatic environment.
Whatever cannot be saved for recovery or recycling should be handled as hazardous waste and sent to a RCRA approved waste facility. Processing, use or contamination of this product may change the waste management options. State and local disposal regulations may differ from federal disposal regulations. Dispose of container and unused contents in accordance with federal, state and local requirements.
Domestic (Land, D.O.T.)
Proper Shipping Name: RQ, OXIDIZING SOLID, CORROSIVE, N.O.S. (POTASSIUM CHROMATE)
Hazard Class: 5.1, 8
Packing Group: III
Information reported for product/size: 375LB
International (Water, I.M.O.)
Proper Shipping Name: OXIDIZING SOLID, CORROSIVE, N.O.S. (POTASSIUM CHROMATE)
Hazard Class: 5.1, 8
Packing Group: III
Information reported for product/size: 375LB
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