Reagent Alcohol (Tax-Free)

Reagent Alcohol (RGA) is a widely used denatured ethanol. Since it is denatured (5 parts by gallon of IPA to 95 parts SDA 3A), it is also not subject to Federal Tax in the U.S.. However a letter of registration or "Letterhead Approval" from the TTB must be on file for quantities greater than 4L and provided to Sigma-Aldrich prior to purchase.

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793175 Reagent Alcohol ACS reagent
793213 Reagent Alcohol 70%
793183 Reagent Alcohol 95%