Industrial chemicals · Taylor, TXTechnical Data SheetTechnical Data Sheet
Sodium Hydroxide Flakes ACS Grade
ACS Grade
1. Identity & Composition
- Product Name
- Sodium Hydroxide Flakes ACS Grade
- Alliance Code
- sodium-hydroxide-flakes-acs-grade
- Grade
- ACS Grade
- Concentration
- —
- CAS Number
- 1310-73-2PubChem
- Formula
- HNaOPubChem
- Molecular Weight
- 39.997PubChem
- Product Type
- pure_substance
Available GradesSame CAS, alternate grades and concentrations
| Grade | Concentration | Typical Assay | SKU | TDS |
|---|---|---|---|---|
| This grade ACS Grade | — | — | current | current |
| — | 50% | — | sodium-hydroxide-50-membrane-grade-caustic-soda-lye | View TDS → |
| ACS Grade | 50% | — | sodium-hydroxide-50-solution-acs-grade | View TDS → |
| — | 25% | — | sodium-hydroxide-25 | View TDS → |
| ACS Grade | 25% | — | sodium-hydroxide-25-acs-grade | View TDS → |
| — | — | — | komodo-drain-cleaner | View TDS → |
| — | — | — | sodium-hydroxide-10-acs-grade | View TDS → |
| — | — | — | sodium-hydroxide-10-technical-grade | View TDS → |
| — | — | — | sodium-hydroxide-15-acs-grade | View TDS → |
| — | — | — | sodium-hydroxide-15-technical-grade | View TDS → |
| — | — | — | sodium-hydroxide-20-technical-grade | View TDS → |
| — | — | — | sodium-hydroxide-30-technical-grade | View TDS → |
| — | — | — | sodium-hydroxide-flakes | 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
One or more physical-property values are temporarily suppressed pending verification against vendor COA data. For complete properties refer to the Safety Data Sheet (SDS) or contact sales@alliancechemical.com.
- Form
- SolidProduct record
- Odor
- ... Odorless ...Product record
- Density
- 1.5 at 68 °F (USCG, 1999) - Denser than water; will sinkProduct record
- Boiling Point
- greater than 266 °F at 760 mmHg (USCG, 1999)Product record
- Melting Point
- 604 °F (USCG, 1999)Product record
- Flash Point
- Not applicableProduct record
- Vapor Pressure
- 0 mmHg (approx) (NIOSH, 2024)Product record
Strong base — hygroscopic; values may drift in opened containers. See storage guidance.
Materials of Construction
| Material | Rating | Max T (°C) | Notes | Source |
|---|---|---|---|---|
Buna-N (NBR) elastomer | Fair | 40 | Limited service life | Cole-Parmer Chemical Compatibility |
EPDM elastomer | Excellent | 90 | Preferred elastomer | Cole-Parmer Chemical Compatibility |
Viton (FKM) elastomer | Poor | — | Not recommended above 25% | Cole-Parmer Chemical Compatibility |
PTFE fluoropolymer | Excellent | 200 | Lining and gaskets | Cole-Parmer Chemical Compatibility |
Borosilicate Glass glass ceramic | Fair | 25 | Attacked above 30 % or elevated temp; avoid long-term service. | Cole-Parmer Chemical Compatibility |
304 stainless steel metal | Good | 80 | Acceptable for dilute caustic | Cole-Parmer Chemical Compatibility |
316 stainless steel metal | Excellent | 95 | Standard caustic service | Cole-Parmer Chemical Compatibility |
316L Stainless Steel metal | Excellent | 80 | Preferred metal for caustic service. | NACE TM0177 |
Aluminium metal | Not recommended | — | Rapid attack; generates hydrogen | Cole-Parmer Chemical Compatibility |
Carbon steel metal | Good | 50 | Acceptable to 50 °C; caustic embrittlement above | Cole-Parmer Chemical Compatibility |
Carbon Steel metal | Good | 60 | Acceptable below 70 °C; caustic embrittlement risk above. | NACE Caustic Service Limits |
Nickel metal | Excellent | 100 | Preferred for high-temperature caustic | Cole-Parmer Chemical Compatibility |
Zinc / galvanized steel metal | Not recommended | — | Rapid corrosion | Cole-Parmer Chemical Compatibility |
HDPE thermoplastic | Excellent | 60 | Standard drum / IBC material | Cole-Parmer Chemical Compatibility |
Polypropylene thermoplastic | Excellent | 80 | Excellent caustic service to 50 %. | Cole-Parmer Chemical Compatibility |
PP thermoplastic | Excellent | 80 | Preferred for elevated temperature | Cole-Parmer Chemical Compatibility |
PVC thermoplastic | Good | 40 | Acceptable for ambient service | Cole-Parmer Chemical Compatibility |
Ratings reflect the service envelope (concentration × temperature) shown. Always confirm against your specific duty cycle and contact-time before equipment selection. The most cautious rating across overlapping references is shown.
Materials Selection Tool
Showing 17 of 17 materials compatible at the selected envelope.
| Material | Rating | Max T (°C) | Notes |
|---|---|---|---|
Buna-N (NBR) elastomer | Fair | 40 | Limited service life |
EPDM elastomer | Excellent | 90 | Preferred elastomer |
Viton (FKM) elastomer | Poor | — | Not recommended above 25% |
PTFE fluoropolymer | Excellent | 200 | Lining and gaskets |
Borosilicate Glass glass ceramic | Fair | 25 | Attacked above 30 % or elevated temp; avoid long-term service. |
304 stainless steel metal | Good | 80 | Acceptable for dilute caustic |
316 stainless steel metal | Excellent | 95 | Standard caustic service |
316L Stainless Steel metal | Excellent | 80 | Preferred metal for caustic service. |
Aluminium metal | Not recommended | — | Rapid attack; generates hydrogen |
Carbon steel metal | Good | 50 | Acceptable to 50 °C; caustic embrittlement above |
Carbon Steel metal | Good | 60 | Acceptable below 70 °C; caustic embrittlement risk above. |
Nickel metal | Excellent | 100 | Preferred for high-temperature caustic |
Zinc / galvanized steel metal | Not recommended | — | Rapid corrosion |
HDPE thermoplastic | Excellent | 60 | Standard drum / IBC material |
Polypropylene thermoplastic | Excellent | 80 | Excellent caustic service to 50 %. |
PP thermoplastic | Excellent | 80 | Preferred for elevated temperature |
PVC thermoplastic | Good | 40 | Acceptable for ambient service |
Regulatory & Transport
DOT / 49 CFR
- UN Number
- UN1823Adjudicated
- Hazard Class
- 8Adjudicated
- Packing Group
- IIAdjudicated
- Proper Shipping Name
- Sodium hydroxide, solidAdjudicated
GHS / OSHA HazCom 2012
- Signal Word
- DangerAdjudicated
- H-Codes (Hazard Statements)
- H290, H314ECHA CLP Annex VI
- P-Codes (Precautionary Statements)
- P234, P260, P264, P280, P301+P330+P331, P303+P361+P353, P304+P340, P305+P351+P338, P310, P321, P363, P405, P501ECHA CLP Annex VI
Occupational Exposure Limits
- OSHA PEL (29 CFR 1910.1000)
- 2 mg/m³ TWAOSHA 29 CFR 1910.1000
- ACGIH TLV
- —unknown
- NIOSH REL
- 2 mg/m³ ceilingNIOSH Pocket Guide
- NIOSH IDLH
- 10 mg/m³NIOSH Pocket Guide
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 Hydroxide Flakes ACS 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 |
|---|---|---|---|---|
| S5881 | ACS Reagent | ≥97% | Exact | Reagent grade, anhydrous pellets |
Cross-references are informational. Confirm against the manufacturer's current specification before substitution. Competitor trademarks are property of their respective owners.
Application Guidance
Sodium Hydroxide Flakes ACS Grade (ACS Grade) is a strong base used for pH control, saponification, and chemical manufacturing.
- pH adjustment and neutralization
- Saponification and detergent manufacturing
- Pulp and paper processing
- Water treatment and softening
- Chemical synthesis (caustic-driven reactions)
Highly exothermic when diluted — control mixing rate and temperature. Hygroscopic; protect from atmospheric moisture and CO2.
Storage & Handling
- Recommended Storage
- Cool, dry, well-ventilated area in compatible containers (HDPE, lined steel — not aluminium). Tightly sealed; protect from atmospheric moisture and CO2. Segregate from acids and oxidizers.
- Handling Precautions
- Use full PPE including chemical splash goggles and alkali-resistant gloves. Add base to water slowly with stirring. Highly exothermic dilution.
- Incompatibilities
- Acids (violent neutralization), aluminium, zinc, tin (generates hydrogen gas), halogens, organic nitro compounds.
- Shelf Life
- 24 months from date of manufacture in sealed, original packaging
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)
UN1823, Sodium hydroxide, solid, 8, PG II
Sourced from 49 CFR 172.101. Confirm against shipping documents and carrier requirements before tender.
Revision History
Last reviewed 2026-05-20 by Hossein Taki, Vice President (Vice President, Alliance Chemical · CAGE Code 1LT50 · DOT Hazmat Registrant #2188383).
| Version | Date | Change | Trigger |
|---|---|---|---|
| 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.