What is the difference between the grades of Phosphoric Acid?

Grade denotes the purity specification and intended use. ACS/reagent grade meets American Chemical Society purity tests for laboratory work; USP/NF and food grade meet pharmacopeial/food-safety standards; technical/industrial grade is process-suitable at lower cost. Concentration denotes the strength of the solution. Alliance Chemical publishes the exact specification and a certificate of analysis for each Phosphoric Acid variant.

Which grade of Phosphoric Acid do I need?

Choose by application: ACS/reagent for analytical and lab work, USP/NF or food grade for pharmaceutical or food contact, technical/industrial for manufacturing and cleaning. Compare the specifications on this page, or contact Alliance Chemical to confirm fit for your process.

Phosphoric Acid: grade & concentration comparison

Alliance Chemical stocks 26 variants of Phosphoric Acid (CAS 7664-38-2): ACS Grade 85%, Technical Grade 85%, USP Food Grade 85%, 75%, ACS Grade 75%, USP Food Grade 75%, ACS 50%, Food 50%, Technical 50%, ACS 45%, ACS 30%, Reagent 30%, ACS 20%, Food 20%, Technical 20%, ACS 15%, Food 15%, Technical 15%, ACS 10%, Food 10%, Technical 10%, ACS 5%, Food 5%, Technical 5%, Food, Technical. Compare grade, concentration, and transport classification below, then open the SDS, technical data sheet, or certificate of analysis for the variant you need.

CAS 7664-38-2 · 26 variants

Variant	Grade	Concentration	Hazard	Documents
Phosphoric Acid 85% ACS Grade	ACS Grade	85%	CLASS 8 · UN1805Danger	SDS TDS COA
Phosphoric Acid 85% - Technical Grade	Technical Grade	85%	CLASS 8 · UN1805Danger	SDS TDS COA
Phosphoric Acid 85% USP Food Grade	USP Food Grade	85%	CLASS 8 · UN1805Danger	SDS TDS COA
Phosphoric Acid 75% Technical Grade	—	75%	CLASS 8 · UN1805Danger	SDS TDS COA
Phosphoric Acid 75 ACS Grade	ACS Grade	75%	CLASS 8 · UN1805Danger	SDS TDS COA
Phosphoric Acid 75% USP Food Grade	USP Food Grade	75%	CLASS 8 · UN1805Danger	SDS TDS COA
Phosphoric Acid 50% ACS Grade	ACS	50%	CLASS 8 · UN1805Danger	SDS TDS COA
Phosphoric Acid 50% Food Grade	Food	50%	CLASS 8 · UN1805Danger	SDS TDS COA
Phosphoric Acid 50% Technical Grade	Technical	50%	CLASS 8 · UN1805Danger	SDS TDS COA
Phosphoric Acid 45% ACS Grade	ACS	45%	CLASS 8 · UN1805Danger	SDS TDS COA
Phosphoric Acid 30% ACS Grade	ACS	30%	CLASS 8 · UN1805Danger	SDS TDS COA
Phosphoric Acid 30% - The Ultimate Rust Remover Solution Technical Grade	Reagent	30%	CLASS 8 · UN1805Danger	SDS TDS COA
Phosphoric Acid 20% ACS Grade	ACS	20%	CLASS 8 · UN1805Danger	SDS TDS COA
Phosphoric Acid 20% Food Grade	Food	20%	CLASS 8 · UN1805Danger	SDS TDS COA
Phosphoric Acid 20% Technical Grade	Technical	20%	CLASS 8 · UN1805Danger	SDS TDS COA
Phosphoric Acid 15% ACS Grade	ACS	15%	CLASS 8 · UN1805Danger	SDS TDS COA
Phosphoric Acid 15% Food Grade	Food	15%	CLASS 8 · UN1805Danger	SDS TDS COA
Phosphoric Acid 15% Technical Grade	Technical	15%	CLASS 8 · UN1805Danger	SDS TDS COA
Phosphoric Acid 10% ACS Grade	ACS	10%	CLASS 8 · UN1805Danger	SDS TDS COA
Phosphoric Acid 10% Food Grade	Food	10%	CLASS 8 · UN1805Danger	SDS TDS COA
Phosphoric Acid 10% Technical Grade	Technical	10%	CLASS 8 · UN1805Danger	SDS TDS COA
Phosphoric Acid 5% ACS Grade	ACS	5%	CLASS 8 · UN1805Danger	SDS TDS COA
Phosphoric Acid 5% Food Grade	Food	5%	CLASS 8 · UN1805Danger	SDS TDS COA
Phosphoric Acid 5% Technical Grade	Technical	5%	CLASS 8 · UN1805Danger	SDS TDS COA
Phosphoric Acid 45% Food Grade	Food	—	CLASS 8 · UN1805Danger	SDS TDS COA
Phosphoric Acid 45% Technical Grade	Technical	—	CLASS 8 · UN1805Danger	SDS TDS COA

About these grades

All variants share CAS 7664-38-2. Grade and concentration determine purity specification and strength; each variant's exact specification, hazard classification, and a certificate of analysis are published by Alliance Chemical and linked above. Lot-specific certificates ship with every order.