Industrial chemicals · Taylor, TXTechnical Data Sheet
Technical Data Sheet
Oxalic Acid ACS Grade
ACS Grade
- CAS number
- 6153-56-6
- Structure
Structure · PubChem - Grade
- ACS Grade
- Signal word
- Danger
- Hazards
Last reviewed 2026-07-17 by Andre Taki, Chief Commercial Officer.
Identity & Composition
- Product Name
- Oxalic Acid ACS Grade
- Alliance Code
- oxalic-acid-acs-grade
- Grade
- ACS Grade
- Concentration
- —
- CAS Number
- 6153-56-6Adjudicated
- Formula
- C2H2O4·2H2OAdjudicated
- Molecular Weight
- 126.07Adjudicated
- Product Type
- Pure substance
Specifications
| Test | Specification | Typical | Method | Source |
|---|---|---|---|---|
| Assay | 99.5-102.5% | 101.2 % | Redox Titration | Interpreted |
| Calcium (Ca) | 0.001 % max | 0.00014 % | — | Interpreted |
| Chloride (Cl) | 0.002 % max | 0.00036 % | — | Interpreted |
| Heavy metals | 5 ppm max | 0.39 ppm | ICP-OES | Interpreted |
| Insoluble material | ≤0.005% | 0.0007% | — | Interpreted |
| Iron (Fe) | 2 ppm max | 0.38 ppm | — | Interpreted |
| Nitrogen compounds (as N) | ≤0.001% | 0.00018 % | — | Interpreted |
| Residue after ignition | 0.01 % max | 0.0017 % | — | Interpreted |
| Substances darkened by hot sulfuric acid | To pass test | Passes test | — | Interpreted |
| Sulfates (SO4) | 0.005 % max | 0.0011 % | — | Interpreted |
| Identification (Infrared absorption) | Conforms to reference spectrum of oxalic acid dihydrate | Passes test | FTIR, KBr disc, comparison to reference spectrum | 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.
Real-Lot StatisticsBased on 1 lot over the last 24 months
Lot statistics not yet available for this product — need at least 3 lots, have 1.
Aggregated from real laboratory measurements on shipped lots. Source: Alliance Chemical lot records. Not a specification.
Physical & Chemical Properties
| Property | Value | Source |
|---|---|---|
| Appearance | Colorless to white crystals | Adjudicated |
| Form | Solid | Adjudicated |
| Odor | Odorless | Adjudicated |
| Specific Gravity | 1.653 | Adjudicated |
| Density | 1.653 g/cm3 | Adjudicated |
| Boiling Point | Not applicable (loses water of hydration, then decomposes) | Adjudicated |
| Melting Point | 101.5 °C (214.7 °F) | Adjudicated |
| Flash Point | Not applicable (non-flammable) | Adjudicated |
| Vapor Pressure | Negligible at 20 °C | Adjudicated |
| Solubility (water) | Soluble in water (13-14 g/100 mL at 20 °C) and alcohol | Adjudicated |
Regulatory & Transport
DOT / 49 CFR
- UN Number
- Not regulatedAdjudicated
- Hazard Class
- Not regulatedAdjudicated
- Packing Group
- Not regulatedAdjudicated
- Proper Shipping Name
- Not regulatedAdjudicated
GHS / OSHA HCS 2024
- Signal Word
- DangerAdjudicated
- H-Codes (Hazard Statements)
- H302, H312, H315, H318, H373Adjudicated
- P-Codes (Precautionary Statements)
- P260, P264, P270, P280, P301+P312, P302+P352, P305+P351+P338, P310, P313, P314, P321, P330, P362, 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 / 2 mg/m³ STELNIOSH Pocket Guide
- NIOSH IDLH
- 500 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 Oxalic Acid ACS Grade. Every file included is SHA-256 hashed and listed in a manifest your QA team can audit.
Applications
- Laboratory, research or manufacturing use as an ACS reagent, including as a reagent meeting specifications for testing USP/NF monographsdigitalassets.avantorsciences.com
- Used as an analytical quality standard / reagent against which other substances are gradedsciencelab.com
- Industrial use as a precipitating agent in rare earth mineral processing, bleaching agent for textiles and wood pulp, and rust remover in metal treatmentwintersunchem.com
- Marble polishing/grinding, waste water treatment, calcium removal from water, equipment cleaning and sterilizing, and photographic reducing / ink removalwintersunchem.com
- Removal of food and rust stains from countertops, plumbing fixtures and fabricswintersunchem.com
- Functions as a chelating agent, fixative, bleaching agent, analytical reagent and cleanerwintersunchem.com
- Used in the dyeing industry as a mordant and as a cleaning agentsciencelab.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 containers tightly closed in a cool, dry, well-ventilated place and protect from moisture (hygroscopic); store locked up. Minimize dust generation and accumulation.Adjudicated
- Handling Precautions
- Use standard chemical PPE — splash goggles, gloves, lab coat. Refer to SDS for hazard-specific PPE requirements.Class-level guidance — not product-specific; the SDS controls.
- Incompatibilities
- Strong oxidizing agents; strong bases and alkalis; metals; acid chlorides; chlorites and hypochlorites; silver compounds (explosive silver oxalate); furfuryl alcohol.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)
Not regulated for transport.
Confirm against shipping documents and carrier requirements before tender.
NMFC Class
70
Revision History
Last reviewed 2026-07-17 by Andre Taki, Chief Commercial Officer, DOT Hazmat–certified (49 CFR 172.704).
| Version | Date | Change | Trigger |
|---|---|---|---|
| 1.7 | 2026-10-13 | Canonical data updated: 4 fields changed via the provenance/adjudication pipeline.
| canonical_change |
| 1.6 | 2026-10-08 | Canonical data updated: 3 fields changed via the provenance/adjudication pipeline.
| canonical_change |
| 1.5 | 2026-10-05 | Canonical data updated: 3 fields changed via the provenance/adjudication pipeline.
| canonical_change |
| 1.4 | 2026-09-24 | Canonical data updated: 8 fields changed via the provenance/adjudication pipeline.
| canonical_change |
| 1.3 | 2026-07-22 | Canonical data updated: 4 fields changed via the provenance/adjudication pipeline.
| canonical_change |
| 1.2 | 2026-07-17 | Canonical data updated: 4 fields changed via the provenance/adjudication pipeline.
| canonical_change |
| 1.1 | 2026-07-17 | Canonical data re-verified: 10 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.