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Chemical Datasheet
LEAD CHROMATE |
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Chemical Identifiers
CAS Number |
UN/NA Number |
DOT Hazard Label |
USCG CHRIS Code |
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none
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NIOSH Pocket Guide |
International Chem Safety Card |
Chromic acid and chromates
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NFPA 704
data unavailable
General Description
PHYSICAL DESCRIPTION: Yellow or orange-yellow powder. One of the most insoluble salts. Basic lead chromates are used as pigments. (NTP, 1992)
Hazards
Reactivity Alerts
Air & Water Reactions
Insoluble in water.
Fire Hazard
Flammability and Flash point data are unavailable; this compound is probably non-flammable. (NTP, 1992)
Health Hazard
ACUTE/CHRONIC HAZARDS: This compound is toxic by ingestion and inhalation. (NTP, 1992)
Reactivity Profile
LEAD CHROMATE reacts violently with ferric ferrocyanide (NTP, 1992). The mixture of sulfur and the chromate is pyrophoric, as is the case of tantalum and the chromate. Under certain conditions, combinations of dry mixtures of lead chromate pigment and azo-dyes (nitrobenzeneazo derivatives) may lead to explosions. When these materials are intimately mixed, violent reactions may result [Loss Prev. Bull., 1978, (022), 117].
Belongs to the Following Reactive Group(s)
- Salts, Basic
- Oxidizing Agents, Strong
Potentially Incompatible Absorbents
Use caution: Liquids with this reactive group classification have been
known to react with the
absorbents
listed below.
- Cellulose-Based Absorbents
- Expanded Polymeric Absorbents
Response Recommendations
Isolation and Evacuation
Excerpt from 140
[Oxidizers]:
IMMEDIATE PRECAUTIONARY MEASURE: Isolate spill or leak area in all directions for at least 50 meters (150 feet) for liquids and at least 25 meters (75 feet) for solids.
LARGE SPILL: Consider initial downwind evacuation for at least 100 meters (330 feet).
FIRE: If tank, rail car or tank truck is involved in a fire, ISOLATE for 800 meters (1/2 mile) in all directions; also, consider initial evacuation for 800 meters (1/2 mile) in all directions. If ammonium nitrate is in a tank, rail car or tank truck and involved in a fire, ISOLATE for 1600 meters (1 mile) in all directions; also, initiate evacuation including emergency responders for 1600 meters (1 mile) in all directions. (ERG, 2020)
Firefighting
This compound is not very flammable but any fire involving this compound may produce dangerous vapors. You should evacuate the area. All firefighters should wear full-body protective clothing and use self-contained breathing apparatuses. You should extinguish any fires involving this chemical with a dry chemical, carbon dioxide, foam, or halon extinguisher. (NTP, 1992)
Non-Fire Response
SMALL SPILLS AND LEAKAGE: Should a spill occur while you are handling this chemical, you should dampen the solid spill material with dilute acid or dilute alkali (e.g. dilute HNO3), then transfer the dampened material to a suitable container. Use absorbent paper dampened with the dilute acid or alkali to pick up any remaining material. Seal the absorbent paper and any of your clothing which may be contaminated in a vapor-tight plastic bag for eventual disposal. Solvent-wash all contaminated surfaces with dilute acid or alkali followed by washing with strong soap and water solution. Do not reenter the contaminated area until the Safety Officer (or other responsible person) has verified that the area has been properly cleaned.
STORAGE PRECAUTIONS: You should keep this material in a tightly-closed container under an inert atmosphere, and store it in a freezer. (NTP, 1992)
Protective Clothing
RECOMMENDED RESPIRATOR: Where the neat test chemical is weighed and diluted, wear a NIOSH-approved half face respirator equipped with an organic vapor/acid gas cartridge (specific for organic vapors, HCl, acid gas and SO2) with a dust/mist filter. (NTP, 1992)
DuPont Tychem® Suit Fabrics
No information available.
First Aid
EYES: First check the victim for contact lenses and remove if present. Flush victim's eyes with water or normal saline solution for 20 to 30 minutes while simultaneously calling a hospital or poison control center. Do not put any ointments, oils, or medication in the victim's eyes without specific instructions from a physician. IMMEDIATELY transport the victim after flushing eyes to a hospital even if no symptoms (such as redness or irritation) develop.
SKIN: IMMEDIATELY flood affected skin with water while removing and isolating all contaminated clothing. Gently wash all affected skin areas thoroughly with soap and water. If symptoms such as redness or irritation develop, IMMEDIATELY call a physician and be prepared to transport the victim to a hospital for treatment.
INHALATION: IMMEDIATELY leave the contaminated area; take deep breaths of fresh air. IMMEDIATELY call a physician and be prepared to transport the victim to a hospital even if no symptoms (such as wheezing, coughing, shortness of breath, or burning in the mouth, throat, or chest) develop. Provide proper respiratory protection to rescuers entering an unknown atmosphere. Whenever possible, Self-Contained Breathing Apparatus (SCBA) should be used; if not available, use a level of protection greater than or equal to that advised under Protective Clothing.
INGESTION: Some heavy metals are VERY TOXIC POISONS, especially if their salts are very soluble in water (e.g., lead, chromium, mercury, bismuth, osmium, and arsenic). IMMEDIATELY call a hospital or poison control center and locate activated charcoal, egg whites, or milk in case the medical advisor recommends administering one of them. Also locate Ipecac syrup or a glass of salt water in case the medical advisor recommends inducing vomiting. Usually, this is NOT RECOMMENDED outside of a physician's care. If advice from a physician is not readily available and the victim is conscious and not convulsing, give the victim a glass of activated charcoal slurry in water or, if this is not available, a glass of milk, or beaten egg whites and IMMEDIATELY transport victim to a hospital. If the victim is convulsing or unconscious, do not give anything by mouth, assure that the victim's airway is open and lay the victim on his/her side with the head lower than the body. DO NOT INDUCE VOMITING. IMMEDIATELY transport the victim to a hospital.
OTHER: Since this chemical is a known or suspected carcinogen you should contact a physician for advice regarding the possible long term health effects and potential recommendation for medical monitoring. Recommendations from the physician will depend upon the specific compound, its chemical, physical and toxicity properties, the exposure level, length of exposure, and the route of exposure. (NTP, 1992)
Physical Properties
Flash Point: data unavailable
Lower Explosive Limit (LEL): data unavailable
Upper Explosive Limit (UEL): data unavailable
Autoignition Temperature: data unavailable
Melting Point:
1551°F
(NTP, 1992)
Vapor Pressure: data unavailable
Vapor Density (Relative to Air): data unavailable
Specific Gravity:
6.12
at 59°F
(NTP, 1992)
- Denser than water; will sink
Boiling Point:
Decomposes
(NTP, 1992)
Molecular Weight:
323.18
(NTP, 1992)
Water Solubility:
less than 1 mg/mL
at 66°F
(NTP, 1992)
Ionization Energy/Potential: data unavailable
IDLH:
15 mg Cr(VI)/m3
; A potential occupational carcinogen.
(NIOSH, 2023)
AEGLs (Acute Exposure Guideline Levels)
No AEGL information available.
ERPGs (Emergency Response Planning Guidelines)
No ERPG information available.
PACs (Protective Action Criteria)
Chemical |
PAC-1 |
PAC-2 |
PAC-3 |
Lead chromate (7758-97-6)
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0.036 mg/m3 |
16 mg/m3 |
97 mg/m3 |
(DOE, 2018)
Regulatory Information
EPA Consolidated List of Lists
Regulatory Name |
CAS Number/ 313 Category Code |
EPCRA 302 EHS TPQ |
EPCRA 304 EHS RQ |
CERCLA RQ |
EPCRA 313 TRI |
RCRA Code |
CAA 112(r) RMP TQ |
Chromium Compounds |
N090 |
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& |
313 |
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Lead Compounds |
N420 |
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& |
313 |
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(EPA List of Lists, 2022)
CISA Chemical Facility Anti-Terrorism Standards (CFATS)
No regulatory information available.
OSHA Process Safety Management (PSM) Standard List
No regulatory information available.
Alternate Chemical Names
- BASIC LEAD CHROMATE
- C.I. PIGMENT YELLOW 34
- C.P. CHROME YELLOW LIGHT
- C.P. CHROME YELLOW MEDIUM
- C.P. CHROME YELLOW PRIMROSE
- CANARY CHROME YELLOW 40-2250
- CHROME GREEN
- CHROME GREEN UC61
- CHROME GREEN UC74
- CHROME GREEN UC76
- CHROME LEMON
- CHROME ORANGE
- CHROME YELLOW
- CHROME YELLOW 5G
- CHROME YELLOW G
- CHROME YELLOW GF
- CHROME YELLOW LF
- CHROME YELLOW LIGHT 1066
- CHROME YELLOW LIGHT 1075
- CHROME YELLOW MEDIUM 1074
- CHROME YELLOW MEDIUM 1085
- CHROME YELLOW MEDIUM 1298
- CHROME YELLOW PRIMROSE 1010
- CHROME YELLOW PRIMROSE 1015
- CHROMIC ACID, LEAD (2+) SALT (1:1)
- CHROMIC ACID, LEAD SALT
- CHROMIC ACID, LEAD SALT, BASIC
- CHROMIUM YELLOW
- CI 77600
- COLOGNE YELLOW
- CROCIOTE
- DIANICHI CHROME YELLOW G
- KING'S YELLOW
- LEAD CHROMATE
- LEAD CHROMATE (PBCRO4)
- LEAD CHROMATE (VI)
- LEAD CHROMATE(VI) (PBCRO4)
- LEIPZIG YELLOW
- LEMON YELLOW
- PARIS YELLOW
- PIGMENT GREEN 15
- PLUMBOUS CHROMATE
- PURE LEMON CHROME L3GS