Cupric sulfate (copper sulfate) in the form of blue, medium sized crystals. Soluble in water and methanol; slightly soluble in ethyl alcohol and glycerin. Toxic by ingestion and a strong irritant so care should be taken in handling.
Cupric sulfate is a commonly used chemical for patination due to its ability to create a greenish-blue patina on copper surfaces.
Used in the following patina formulas:
- No. 5 for Antique Green
- No. 9 for Light Green
- No. 17 for Deep Rust Red
- No 20 for Red – semi-matt (For Copper & Copper Plate)
- No. 22 for Red – Purple Satin (For Cast Bronze)
- No. 23 for Orange Brown (For Cast Bronze)
- No. 25 for Blue Green (For Cast Bronze)
- No. 26 for Golden Yellow (For Cast Bronze)
- No. 29 for Reddish Brown (For Cast Brass)
Cupric sulfate readily forms blue, triclinic crystals. Read our article, “Growing Large Crystals with Seed Crystals” for more information.
For shipping, Cupric Sulfate is in hazardous materials Class 9: Miscellaneous Dangerous Substances. It only ships to destinations within the 48 contiguous US states using Standard Ground. A HazMat fee applies to this 12.5 kg size. Adult signature required upon delivery. Shipping to a commercial address is suggested.
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