Industrial chemicals · Taylor, TXTechnical Data Sheet
Potassium Hydroxide (KOH) Technical Grade
Technical · 90.3%
Identity & Composition
- Product Name
- Potassium Hydroxide (KOH) Technical Grade
- Alliance Code
- potassium-hydroxide-flakes-koh
- Grade
- Technical
- Concentration
- 90.3%
- CAS Number
- 1310-58-3PubChem
- Formula
- HKOPubChem
- Molecular Weight
- 56.106PubChem
- Product Type
- pure_substance
Specifications
| Test | Specification | Typical | Method | Source |
|---|---|---|---|---|
| Assay | 90% | 90 % | Acidimetric titration (Acidim.) | Supplier specification |
| Hydroxide alkalinity as KOH (wt. %) | 90 min | 90.8 wt % | — | Supplier specification |
| Arsenic (As) | 0.0003 % | 0.00001 % | — | Supplier specification |
| Potassium chloride as KCl (ppm by wt.) | 150 max | 36 ppm | — | Supplier specification |
| Heavy metals (as Pb) | ≤0.002% | 0.0001 % | — | Supplier specification |
| Iron as Fe (ppm by wt.) | 3 max | 1.2 ppm | — | Supplier specification |
| Lead (Pb) | 0.005 % | 0.00001 % | — | Supplier specification |
| Nickel as Ni (ppm by wt.) | 4 max | 1.5 ppm | — | Supplier specification |
| Potassium carbonate as K2CO3 (wt. %) | 0.44 max | 0.30 wt % | — | Supplier specification |
| Potassium Carbonate (K2CO3) | ≤1.0% | 0.30 % | — | Supplier specification |
| Sulfate (SO4) | 0.05% | 0.0003 % | — | Supplier specification |
| Insoluble matter in H2O | 0.05 % | 0.001 % | — | Supplier specification |
| Sodium (as Na) | 0.5% Max. | 0.24 % | Flame AAS / ICP-OES | Interpreted |
| carbonate as k2co3 | 0.5 wt % max | 0.30 wt % | — | Supplier specification |
Specification values are guaranteed limits. Typical values are representative of production lots and are not guaranteed. Lot-specific certificates of analysis ship with every order.
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.
| Property | Value | Source |
|---|---|---|
| Form | Solid | Published reference |
| Odor | Odorless | Published reference |
| Density | 1.45 to 1.50 at 68 °F (USCG, 1999) | Published reference |
| Boiling Point | greater than 266 °F at 760 mmHg (USCG, 1999) | Published reference |
| Melting Point | 680 °F approximately (NTP, 1992) | Published reference |
| Flash Point | N/A | Published reference |
| Vapor Pressure | 1 mmHg at 1326 °F ; 5 mmHg at 1497 °F (NTP, 1992) | Published reference |
| Solubility (water) | 107 g/100 cc at 59 °F (NTP, 1992) | Published reference |
Strong base — hygroscopic; values may drift in opened containers. See storage guidance.
Materials of ConstructionService envelope ≈ 90.3%
| 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 | Universal compatibility. | 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 |
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 |
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 |
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 13 of 13 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 | Universal compatibility. |
304 stainless steel metal | Good | 80 | Acceptable for dilute caustic |
316 stainless steel metal | Excellent | 95 | Standard caustic service |
Aluminium metal | Not recommended | — | Rapid attack; generates hydrogen |
Carbon steel metal | Good | 50 | Acceptable to 50 °C; caustic embrittlement 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 |
PP thermoplastic | Excellent | 80 | Preferred for elevated temperature |
PVC thermoplastic | Good | 40 | Acceptable for ambient service |
Regulatory & Transport
DOT / 49 CFR
- UN Number
- UN181349 CFR 172.101
- Hazard Class
- 8Adjudicated
- Packing Group
- IIAdjudicated
- Proper Shipping Name
- Potassium Hydroxide, solidAdjudicated
GHS / OSHA HazCom 2012
- Signal Word
- DangerAdjudicated
- H-Codes (Hazard Statements)
- H290, H302, H314ECHA CLP Annex VI
- P-Codes (Precautionary Statements)
- P234, P260, P264, P270, P280, P301+P312+P330, 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)
- —no canonical
- ACGIH TLV
- —no canonical
- NIOSH REL
- 2 mg/m³ ceilingNIOSH Pocket Guide
- 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 Potassium Hydroxide (KOH) Technical Grade. Every file included is SHA-256 hashed and listed in a manifest your QA team can audit.
Applications
- Industrial uses of potassium hydroxide: detergents/soaps, dyeing and bleaching, paint and varnish removers, electroplating, photo engraving, lithography, alkaline batteries, analytical chemistry, fuel and gas, thickening agent, organic synthesis, stabilizercorecheminc.com
- Used in a large number of manufacturing processesstore.astm.org
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
- Store at room temperature; the material is deliquescent and absorbs CO2 and moisture from the air, and the supplier's precautionary phrases include P405 (store locked up).itwreagents.com
- Handling Precautions
- Use full PPE including chemical splash goggles and alkali-resistant gloves. Add base to water slowly with stirring. Highly exothermic dilution.Class-level guidance — not product-specific; the SDS controls.
- Incompatibilities
- Acids (violent neutralization), aluminium, zinc, tin (generates hydrogen gas), halogens, organic nitro compounds.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)
UN1813, Potassium Hydroxide, solid, 8, PG II
Sourced from 49 CFR 172.101. Confirm against shipping documents and carrier requirements before tender.
Revision History
Last reviewed 2026-06-18 by Andre Taki, DOT Hazmat Specialist.
| Version | Date | Change | Trigger |
|---|---|---|---|
| 1.3 | 2026-08-05 | Canonical data updated: 1 field changed via the provenance/adjudication pipeline.
| canonical_change |
| 1.2 | 2026-07-22 | Canonical data updated: 1 field changed via the provenance/adjudication pipeline.
| canonical_change |
| 1.1 | 2026-06-18 | Canonical data re-verified: 3 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.