Industrial chemicals · Taylor, TXTechnical Data Sheet
Phosphoric Acid 75% USP Food Grade
USP Food Grade · 75%
- CAS number
- 7664-38-2
- UN number
- UN1805
- Hazard class · packing group
- 8 · PG III
- Structure
Structure · PubChem - Grade
- USP Food Grade · 75%
- Signal word
- Danger
- Hazards
- Proper shipping name
- Phosphoric acid solution
Identity & Composition
- Product Name
- Phosphoric Acid 75% USP Food Grade
- Alliance Code
- phosphoric-acid-75-usp-food-grade
- Grade
- USP Food Grade
- Concentration
- 75%
- CAS Number
- 7664-38-2PubChem
- Formula
- —PubChem
- Molecular Weight
- —PubChem
- Product Type
- Solution
Specifications
| Test | Specification | Typical | Method | Source |
|---|---|---|---|---|
| Assay (H3PO4) | 74.5 - 75.5 % | 75.07 % | acidimetry | Interpreted |
| Arsenic (As) | Not more than 3 mg/kg | 0.061 mg/kg | — | Interpreted |
| Cadmium (Cd) | Not more than 3 mg/kg | 0.035 mg/kg | — | Interpreted |
| Chlorides (Cl) | 10 ppm Cl maximum | 1.6 ppm | — | Interpreted |
| Color (maximum) | 10 APHA Units max | 5 | — | Interpreted |
| Fluoride (F) | Not more than 10 mg/kg | 1.9 mg/kg | — | Interpreted |
| Iron (Fe) | 10 ppm Fe maximum | 1.8 ppm | — | Interpreted |
| Lead (Pb) | Not more than 3 mg/kg | 0.041 mg/kg | — | Interpreted |
| Identification (phosphate) | A 1:10 aqueous solution gives positive tests for Phosphate | Passes test | — | Interpreted |
| Sulfate (SO4) | 100 ppm SO4 maximum | 13 ppm | — | Interpreted |
| Mercury (Hg) | Not more than 1 mg/kg | 0.022 mg/kg | Cold-vapour AAS (EPA 245.1) | Interpreted |
| Composition | 75 % phosphoric acid in deionized water, by weight | Conforms | By formulation; confirmed by specific gravity | Interpreted |
Values are reproduced from the current product reference. Source labels do not by themselves establish a supplier guarantee or a test result for your lot. Confirm applicable acceptance limits and request lot-specific documentation.
Available GradesSame CAS, alternate grades and concentrations
| Grade | Concentration | Typical Assay | SKU | TDS |
|---|---|---|---|---|
| This grade USP Food Grade | 75% | — | current | current |
| USP Food Grade | 85% | — | phosphoric-acid-85-usp-food-grade | View TDS → |
| ACS Grade | 75% | — | phosphoric-acid-75-acs-grade | View TDS → |
| Technical | 50% | — | phosphoric-acid-50-technical-grade | View TDS → |
| ACS | 45% | — | phosphoric-acid-45-acs-grade | View TDS → |
| Technical | 30% | — | phosphoric-acid-30-the-ultimate-rust-remover-solution | View TDS → |
| Food | 20% | — | phosphoric-acid-20-food-grade | View TDS → |
| Technical | 20% | — | phosphoric-acid-20-technical-grade | View TDS → |
| Technical | 15% | — | phosphoric-acid-15-technical-grade | View TDS → |
| ACS | 10% | — | phosphoric-acid-10-acs-grade | View TDS → |
| ACS | 5% | — | phosphoric-acid-5-acs-grade | View TDS → |
| Technical | 5% | — | phosphoric-acid-5-technical-grade | View TDS → |
| Technical | — | — | phosphoric-acid-45-technical-grade | View TDS → |
Typical assay shown is the rolling-window mean from the sibling product's most recent lots. Grade selection drives downstream end-use — verify the sibling grade matches your specification before substitution.
Physical & Chemical Properties
| Property | Value | Source |
|---|---|---|
| Appearance | Clear, colorless, syrupy liquid | Adjudicated |
| Form | Liquid | Published reference |
| Odor | Odorless | Adjudicated |
| pH | < 1 | Adjudicated |
| Specific Gravity | 1.57 at 25 °C (water = 1) | Adjudicated |
| Density | ≈1.575 (75% solution, 25 °C) | Published reference |
| Boiling Point | 135 °C (275 °F) | Adjudicated |
| Melting Point | -17.5 °C (0.5 °F), freezing point | Adjudicated |
| Flash Point | Not applicable | Adjudicated |
| Vapor Pressure | 5.7 mmHg at 20 °C (water vapor) | Adjudicated |
| Vapor Density | 3.4 (air = 1) | Adjudicated |
| Solubility (water) | Miscible with water in all proportions (releases heat) | Adjudicated |
Strong acid — density and vapor-pressure values shown are at 20 °C; values shift markedly with concentration and temperature. Reference concentration-temperature curves before specifying equipment.
Materials of ConstructionService envelope ≈ 75%
MOC ratings are required for this chemical class but no compatibility data has been seeded yet. Treat as no-data and consult Alliance Technical Services before equipment selection.
Regulatory & Transport
DOT / 49 CFR
- UN Number
- UN1805Adjudicated
- Hazard Class
- 8Adjudicated
- Packing Group
- IIIAdjudicated
- Proper Shipping Name
- Phosphoric acid solutionAdjudicated
GHS / OSHA HCS 2024
- Signal Word
- DangerAdjudicated
- H-Codes (Hazard Statements)
- H290, H314Adjudicated
- P-Codes (Precautionary Statements)
- P234, P260, P264, P280, P301+P330+P331, P303+P361+P353, P304+P340, P305+P351+P338, P310, P321, P363, P390, P405, P406, P501Adjudicated
Occupational Exposure Limits
- OSHA PEL (29 CFR 1910.1000)
- 1 mg/m³ TWAOSHA 29 CFR 1910.1000
- ACGIH TLV
- 1 mg/m³ TWA / 3 mg/m³ STELAdjudicated
- NIOSH REL
- 1 mg/m³ TWA / 3 mg/m³ STELNIOSH Pocket Guide
- NIOSH IDLH
- 1000 mg/m³NIOSH Pocket Guide
Transport descriptions reflect 49 CFR 172.101 lookup at time of publication. Sourced data: NIOSH Pocket Guide for REL/IDLH, OSHA Z-Tables for PEL. Always verify against the latest regulatory text before shipment-critical decisions.
Health & Fire Hazard
Acute Toxicology
- LD₅₀ Oral (rat)
- 1,530 mg/kg (as phosphoric acid)Adjudicated
- LD₅₀ Dermal (rabbit)
- 2,740 mg/kg (as phosphoric acid)Adjudicated
Acute toxicology values from SDS Section 11 or NIOSH RTECS.
Supplier Qualification Packet
One zipped download containing the TDS, SDS, latest lot COA (when available), and a fresh Letter of Continuing Guaranty for Phosphoric Acid 75% USP Food Grade. Every file included is SHA-256 hashed and listed in a manifest your QA team can audit.
Catalog EquivalentsCross-reference vs major chemical suppliers
Sigma-Aldrich
| SKU | Grade | Conc. | Match | Notes |
|---|---|---|---|---|
| 345245 | ACS Reagent | 85% | Unverified candidate | ACS Reagent ≥85% |
Cross-references are informational. Confirm against the manufacturer's current specification before substitution. Competitor trademarks are property of their respective owners.
Applications
- Fertilizer manufacture, and use as a pH modifier, sanitizing agent and rust converterlaballey.com
- Bulk food chemical and bulk pharmaceutical chemical for manufacturing, processing or repackagingdigitalassets.avantorsciences.com
- Miscellaneous or general purpose food additive, GRAS under 21 CFR 182.1073static1.squarespace.com
- Miscellaneous or general purpose feed additive, GRAS under 21 CFR 582.1073static1.squarespace.com
- Acidifying agent in meat and poultry products and margarine; antioxidant synergist in lard, shortening and poultry fatsstatic1.squarespace.com
Applications are drawn from published manufacturer and supplier documentation; each is sourced. Suitability for a specific use is the buyer's to confirm.
Storage & Handling
- Recommended Storage
- Keep tightly closed in corrosion-resistant containers (polyethylene, fiberglass or stainless steel, not mild steel) in a cool, ventilated area away from bases, bleach and metals. Protect from freezing.Adjudicated
- Handling Precautions
- Use full PPE including face shield, acid-resistant gloves and apron. Add acid to water slowly with stirring; never reverse. Ventilation required.Class-level guidance — not product-specific; the SDS controls.
- Incompatibilities
- Strong bases (violent reaction); bleach and other hypochlorite solutions (release chlorine gas) and ammonia; most metals (release flammable hydrogen); sulfides, sulfites and cyanides (release toxic gases); nitromethane (explosive mixtures).Adjudicated
- Shelf Life
- Consult Technical Services for product-specific shelf life
For full hazard, PPE, and emergency response guidance, refer to the Safety Data Sheet (SDS) for this product. The SDS controls in all cases where guidance differs.
Packaging & Logistics
Shipping Description (US DOT)
UN1805, Phosphoric acid solution, 8, PG III
Sourced from 49 CFR 172.101. Confirm against shipping documents and carrier requirements before tender.
Revision History
Last reviewed 2026-07-17 by Andre Taki, Chief Commercial Officer, DOT Hazmat–certified (49 CFR 172.704).
| Version | Date | Change | Trigger |
|---|---|---|---|
| 1.5 | 2026-10-07 | Canonical data updated: 21 fields changed via the provenance/adjudication pipeline.
| canonical_change |
| 1.4 | 2026-10-05 | Canonical data updated: 1 field changed via the provenance/adjudication pipeline.
| canonical_change |
| 1.3 | 2026-09-30 | Canonical data updated: 3 fields changed via the provenance/adjudication pipeline.
| canonical_change |
| 1.2 | 2026-07-22 | Canonical data updated: 2 fields changed via the provenance/adjudication pipeline.
| canonical_change |
| 1.1 | 2026-07-17 | Canonical data re-verified: 5 fields updated against independent vendor SDSs, CLP Annex VI, 49 CFR, and OSHA HazCom 2024 (GHS classification, hazard/precautionary codes, signal word, physical properties as applicable).
| canonical_change |
| 1.0 | 2026-05-20 | Initial URL-first TDS published from canonical chemistry registry. | initial |
This Technical Data Sheet is provided for technical reference. The Safety Data Sheet (SDS) controls in all cases where guidance differs. Values reflect Alliance Chemical canonical data at time of generation; subsequent revisions are recorded in the Revision History above.