Industrial chemicals · Taylor, TXTechnical Data Sheet
Sodium Bisulfite 25% ACS Grade
ACS · 25%
Identity & Composition
- Product Name
- Sodium Bisulfite 25% ACS Grade
- Alliance Code
- sodium-bisulfite-25-acs-grade
- Grade
- ACS
- Concentration
- 25%
- CAS Number
- 7631-90-5Adjudicated
- Formula
- HNaO3SAdjudicated
- Molecular Weight
- 104.06Adjudicated
- Product Type
- solution
Specifications
Not yet characterized — Specification limits for this product have not been published yet. Contact Technical Services for the current specification; lot-specific certificates ship with every order.
Available GradesSame CAS, alternate grades and concentrations
| Grade | Concentration | Typical Assay | SKU | TDS |
|---|---|---|---|---|
| This grade ACS | 25% | — | current | current |
| ACS Grade | 40% | — | sodium-bisulfite-40-acs-grade | View TDS → |
| Technical | 40% | — | sodium-bisulfite-40 | View TDS → |
| Technical | 25% | — | sodium-bisulfite-25 | View TDS → |
| Technical | 15% | — | sodium-bisulfite-15-technical-grade | View TDS → |
| ACS | 10% | — | sodium-bisulfite-10-acs-grade | View TDS → |
| Technical | 10% | — | sodium-bisulfite-10-technical-grade | View TDS → |
| ACS | — | — | sodium-bisulfite-15-acs-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 to light-yellow liquid | Published reference |
| Form | Liquid | Published reference |
| Odor | Slight sulfur dioxide odor | Published reference |
| pH | 3.5-5.0 | Published reference |
| Specific Gravity (20 °C) | ~1.20 | Published reference |
| Density | ~1.18-1.22 g/cm³ (25%, 20°C) | Published reference |
| Boiling Point | ~100-102 °C | Published reference |
| Melting Point | < 0 °C | Published reference |
| Flash Point | Not applicable (non-combustible aqueous solution) | Published reference |
| Solubility (water) | Miscible with water | Published reference |
Regulatory & Transport
DOT / 49 CFR
- UN Number
- UN2693Adjudicated
- Hazard Class
- 8Adjudicated
- Packing Group
- IIIAdjudicated
- Proper Shipping Name
- Bisulfites, aqueous solutions, n.o.s. (Sodium bisulfite)Adjudicated
GHS / OSHA HazCom 2012
- Signal Word
- DangerAdjudicated
- H-Codes (Hazard Statements)
- EUH031, H302, H318Adjudicated
- P-Codes (Precautionary Statements)
- P264, P270, P301+P312, P330, P501Adjudicated
Occupational Exposure Limits
- OSHA PEL (29 CFR 1910.1000)
- —no canonical
- ACGIH TLV
- —no canonical
- NIOSH REL
- —no canonical
- NIOSH IDLH
- —no canonical
Transport descriptions reflect 49 CFR 172.101 lookup at time of publication. Sourced data: ECHA CLP Annex VI for harmonised classifications, 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 Sodium Bisulfite 25% ACS Grade. Every file included is SHA-256 hashed and listed in a manifest your QA team can audit.
Application Guidance
Sodium Bisulfite 25% ACS Grade (ACS) application guidance is available on request. Contact Alliance Chemical Technical Services for grade-specific use recommendations.
Storage & Handling
- Recommended Storage
- Cool, dry, well-ventilated area in original sealed containers. Refer to product SDS for material-specific guidance.Class-level guidance — not product-specific; the SDS controls.
- 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
- Consult the SDS for material-specific incompatibilities.Class-level guidance — not product-specific; the SDS controls.
- 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)
UN2693, Bisulfites, aqueous solutions, n.o.s. (Sodium bisulfite), 8, PG III
Sourced from 49 CFR 172.101. Confirm against shipping documents and carrier requirements before tender.
Revision History
| Version | Date | Change | Trigger |
|---|---|---|---|
| 1.1 | 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.