Question 1

What is the difference between the grades of Phosphoric Acid?

Accepted Answer

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.

Question 2

Which grade of Phosphoric Acid do I need?

Accepted Answer

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.

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

Phosphoric Acid: grade & concentration comparison

About these grades