Red Ochre

/ red   oak • ur /

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About the chemical structure:

Chemical name: Anhydrous iron(III)-oxide
Formula: Fe2O3
Refractive index: n/a


Color Index (C.I.) PR102

How can you identify Red Ochre?


UVF: no

IRFC: yellow


It's identified by means of FTIR and Raman.

Raman spectra: University College London;

FTIR spectra: IRUG

Usage and handling:

Permanence: Toxicity:

Lightfast: excellent.

Degradation processes: the pigment has good hiding power and excellent permanence in all media.

non toxic. Ocher is not considered toxic, but care should be used in handling the dry powder pigment to avoid inhaling the dust.

MSDS: Natural pigments


Fuller. Carl, Natural. Colored Iron Oxide Pigments pp. 281-6. In: Pigment Handbook, 2nd Edition. Lewis, P. (ed.). New York: John Wiley & Sons,1988.
Thomas, Anne Wall. Colors From the Earth, New York: Van Nostrand Reinhold, 1980.