Extremely Toxic. Discontinued, obsolete. Paris Green, historical Emerald Green, Schweinfurt Green. Not suitable for use.
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Emerald Green, Paris Green (Historical Pigment- Obsolete)
PG21
Alternate Names
Scheele's Green
Schweinfurt green
Pigment Description
Resources
PG21 pigment data from David G. Myers, The Color of Art Pigment Database, Artiscreation.com
CAMEO Materials Database: Conservation & Art Materials Encyclopedia Online, Museum of Fine Arts Boston. (Accessed June 2025). Emerald Green https://cameo.mfa.org/wiki/Emerald_green. Museum of Fine Arts Boston.
Stats
Lightfastness
Reactive, color shifts reported
Shifts color. Incompatible with sulfurous pigments
Toxicity
Extremely toxic
CAMEO comments on the extreme toxicity of this pigment. This green is not safe to be around even after it is painted out. Treat all pigments and paints with studio safety protocols.
Dry Time
Very Slow
Mayer assigns this pigment a very slow dry time, and mentions that it forms fairly hard paint films.
Oil Content
Low
Chemical Name
copper acetoarsenite
Cu(C₂H₃O₂)₂.₃Cu(AsO₂)₂
Dry Pigments listing PG21
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