Hydrochloric-acid-toilet-bowl-cleaner-msds, g.k. chemical specialties co. inc. 90 barbados blvd. scarborough, ontario m1j 1k9 tel: (416) 261-7182 fax: (416) 261-5663 material safety data sheetmaterial safety data sheet. Product code hd104032/128 material safety data sheet product name acidic toilet bowl cleaner u.s. federal regulations section 15. regulatory information california prop. 65: no products were found. clean water act (cwa) 311: hydrochloric acid, bowl cleaner is a concentrated acidic liquid designed to quickly remove soils commonly found in toilet bowls. this product is a concentrated blend of hydrochloric (muriatic) acid, phosphoric acid, and an organic acid. the combination of these acids and concentrated surfactants make bowl cleaner one of the most concentrated toilet bowl cleaning products available anywhere.