Salts & Minerals
REACH
Zinc chromate
CAS Number
13530-65-9
EC Number
236-878-9
What is Zinc chromate?
Zinc chromate (CAS 13530-65-9), also sold as Zinc Chrome Yellow and Buttercup Yellow, is an inorganic chromate pigment used primarily for its corrosion-inhibiting properties in protective coatings.
Where is Zinc chromate used?
- Aerospace and defense: primer systems for aluminum and steel airframe components
- Automotive OEM and refinish: primer formulations for steel bodywork and structural parts
- Industrial maintenance: coatings for bridges, pipelines, and heavy steel structures
- Printing inks and specialty packaging coatings: yellow pigment
- It releases chromate ions that passivate metal substrates and suppress underfilm corrosion.
Commercial specifications
- Dry powder in varying particle size distributions
- Specifications typically aligned to ASTM standards referenced in aerospace and defense procurement
- Packaging from small drums to bulk quantities
Other Names (Synonyms)
Buttercup Yellow|Zincro ZTO
What are the physical properties of Zinc chromate?
Melting Point 316 °C
Density 3.40 g/cm³
Appearance Zinc chromate is a yellow crystalline powder.
Color yellow prisms
Water Solubility Insoluble in water.
How is Zinc chromate classified and handled safely? Learn More
Danger
GHS07· Irritant GHS08· Health Hazard GHS09· Environmental Hazard GHS06· Toxic
Hazard Statements
H302 Harmful if swallowed
H317 May cause an allergic skin reaction
H331 Toxic if inhaled
H334 May cause allergy or asthma symptoms or breathing difficulties if inhaled
Precautionary Statements
P203 Obtain, consult and follow expert instructions for use.
P233 Keep container tightly closed.
P260 Do not breathe dust/fume/gas/mist/vapours/spray.
P261 Avoid breathing dust/fume/gas/mist/vapours/spray.