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Hansa Yellow 5G

PY5

Pigment Description

A rarely used Hansa Yellow. It is difficult to find information about Hansa Yellow 5G (PY5). Artiscreation lists it as a bright greenish yellow. We have heard that in the 5G part, the G stands for green. Cameo contains a faint mention of PY5 in its list of names for Hansa Yellows.

Resources

PY5 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. (n.d., accessed June 2025). Hansa Yellow https://cameo.mfa.org/wiki/Hansa_yellow. Museum of Fine Arts Boston.

Stats

Transparency

Varies, Semi-Transparent

Toxicity

Previously though to be Lower Concern, however it may be hazardous than once thought.

While acute toxicity is thought to be low, fellow azo pigments PY1 and PY3 are “related to cancer-causing dyes.” May metabolize to harmful substances 2-nitroaniline and aniline and may cause methemoglobinemia. For more, refer to Monona Rossol's research here for more information.

Chemical Name

Monoazo, Arylamide

with PY5 (Hansa Yellow 5G)
No single-pigment Oil found with PY5

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