Definition

Noun: A toxic, inorganic chemical compound consisting of lead and chromate ions, primarily used historically as a yellow or orange pigment in paints and coatings.

Usage

"Lead chromate" is used as a singular, non-count noun to refer to the specific chemical compound. It is typically used in scientific, industrial, and regulatory contexts. * The analysis confirmed the presence of lead chromate in the vintage paint sample. * Due to its toxicity, the industrial use of lead chromate is now heavily restricted.

Examples

• Scientific Context: "The bright yellow color was historically achieved by adding lead chromate to the formulation."
• Regulatory/Safety Context: "Workers must take precautions to avoid inhaling dust containing lead chromate."
• Historical/Art Context: "Conservators identified lead chromate as the pigment used in the 19th-century artwork."

Advanced Usage

• "chrome yellow": A common name for a specific, bright yellow pigment based on lead chromate.
  • The artist's use of chrome yellow (lead chromate) has darkened over time due to chemical reactions.

Variants and Related Words

• Chrome Yellow (n): A specific pigment name for lead chromate.
• Lead(II) chromate (n): The precise chemical nomenclature.
• Chromate (n): A salt or ester of chromic acid, of which lead chromate is one type.

Synonyms

• Pigment Yellow 34 (A standardized industrial color index name).

Noun

1. a poisonous chromate of lead used as a pigment in paint