Industrial chemicals · Taylor, TXTechnical Data Sheet
Phosphoric Acid 30% ACS Grade
ACS · 30%
- CAS number
- 7664-38-2
- UN number
- UN1805
- Hazard class · packing group
- 8 · PG III
- Structure
Structure · PubChem - Grade
- ACS · 30%
- Signal word
- Danger
- Hazards
- Proper shipping name
- Phosphoric acid solution
Identity & Composition
- Product Name
- Phosphoric Acid 30% ACS Grade
- Alliance Code
- phosphoric-acid-30-acs-grade
- Grade
- ACS
- Concentration
- 30%
- CAS Number
- 7664-38-2Adjudicated
- Formula
- H3O4PAdjudicated
- Molecular Weight
- 97.995Adjudicated
- Product Type
- Solution
Specifications
| Test | Specification | Typical | Method | Source |
|---|---|---|---|---|
| Assay | 29.0 - 31.0 % | 30.1 % | — | Interpreted |
| Arsenic (As) | 0.35 ppm max | 0.014 ppm | — | Interpreted |
| Calcium (Ca) | 0.00071% max | 0.000078 % | — | Interpreted |
| Chloride (Cl) | 1.3 ppm max | 0.16 ppm | — | Interpreted |
| Heavy metals (as Pb) | 0.00035 % max | 0.000024 % | — | Interpreted |
| Iron (Fe) | 0.0011% max | 0.000041 % | — | Interpreted |
| Magnesium (Mg) | 0.00071% max | 0.000074 % | — | Interpreted |
| Nitrate (NO3) | 2 ppm max | 0.19 ppm | — | Interpreted |
| KMnO4 reducible matter (as O) | 0.00035% max | 0.000016 % | — | Interpreted |
| Sodium (Na) | 0.0088% max | 0.00068 % | — | Interpreted |
| Sulfate (SO4) | 0.0011% max | 0.00025 % | — | Interpreted |
| Volatile acids (as CH3COOH) | 0.00035% max | 0.000081 % | — | Interpreted |
| Color (APHA) | Max 10 | 1 | — | Interpreted |
| Reducing substances | Passes Test | Passes test | — | Interpreted |
| Composition | 30 % 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 ACS | 30% | — | current | current |
| USP Food Grade | 85% | — | phosphoric-acid-85-usp-food-grade | View TDS → |
| ACS Grade | 75% | — | phosphoric-acid-75-acs-grade | View TDS → |
| USP Food Grade | 75% | — | phosphoric-acid-75-usp-food-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 | 15% | — | phosphoric-acid-15-technical-grade | View TDS → |
| ACS | 10% | — | phosphoric-acid-10-acs-grade | View TDS → |
| Technical | 10% | — | phosphoric-acid-10-technical-grade | View TDS → |
| ACS | 5% | — | phosphoric-acid-5-acs-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 liquid | Published reference |
| Form | Liquid | Published reference |
| Odor | Odorless | Published reference |
| pH | ~1.5 (30% solution) | Published reference |
| Specific Gravity | 1.175 - 1.185 | Interpreted |
| Density | 1.17-1.18 g/cm³ (30% w/w, 20°C) | Published reference |
| Boiling Point | ~104 °C | Published reference |
| Melting Point | < 0 °C | Published reference |
| Flash Point | Not applicable (non-combustible) | Published reference |
| Solubility (water) | Miscible with water | Published reference |
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 ≈ 30%
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
- —no canonical
- 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.
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 30% ACS Grade. Every file included is SHA-256 hashed and listed in a manifest your QA team can audit.
Application Guidance
Phosphoric Acid 30% ACS Grade (ACS) is a strong mineral acid used across pH control, metal pickling, food and beverage processing, and chemical synthesis. Grade and concentration determine the appropriate end-use and materials.
- Metal pickling, etching, and surface preparation
- pH adjustment in water and wastewater treatment
- Regeneration of ion-exchange resins
- Chemical manufacturing and synthesis
- Food and beverage processing (food-grade only)
Always add acid to water, never water to acid. Use lined or fluoropolymer piping rated for the concentration; carbon steel is not suitable for dilute acid service.
Storage & Handling
- Recommended Storage
- Keep closed in polyethylene or other acid-resistant containers, not mild steel, away from bases, bleach and metals.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 hypochlorites (release chlorine) and ammonia; most metals (release flammable hydrogen); sulfides, sulfites and cyanides (release toxic gases).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
| Version | Date | Change | Trigger |
|---|---|---|---|
| 1.6 | 2026-10-13 | Canonical data updated: 4 fields changed via the provenance/adjudication pipeline.
| canonical_change |
| 1.5 | 2026-10-08 | Canonical data updated: 3 fields changed via the provenance/adjudication pipeline.
| canonical_change |
| 1.4 | 2026-10-07 | Canonical data updated: 3 fields changed via the provenance/adjudication pipeline.
| canonical_change |
| 1.3 | 2026-10-05 | Canonical data updated: 1 field changed via the provenance/adjudication pipeline.
| canonical_change |
| 1.2 | 2026-08-27 | Canonical data updated: 2 fields changed via the provenance/adjudication pipeline.
| canonical_change |
| 1.1 | 2026-07-22 | Canonical data updated: 1 field changed via the provenance/adjudication pipeline.
| canonical_change |
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.