RXSOL Request a Quote Email usugandachemical.com @ gmail.com DocumentsRequest MSDS / TDS Drilling Fluids & Mud Oil Field chemicals Product code: RXSOL-98-9816-025 4 Hydroxybenzoic acid is a monohydroxybenzoic acid a phenolic derivative of benzoic acid Request a Quote Email Us 4 Hydroxybenzoic acid is a monohydroxybenzoic acid a phenolic derivative of benzoic acid.