Industrial chemicals · Taylor, TXTechnical Data Sheet
Sodium Hydroxide 50% Membrane Grade (Caustic Soda, Lye)
Membrane Grade · 50%
- CAS番号
- 1310-73-2
- UN番号
- UN1824
- 危険有害性クラス・容器等級
- 8 · PG II
- 構造
構造・PubChem - グレード
- Membrane Grade · 50%
- 注意喚起語
- Danger
- 危険有害性
- 正式輸送品名
- Sodium hydroxide solution
Identity & Composition
- 製品名
- Sodium Hydroxide 50% Membrane Grade (Caustic Soda, Lye)
- Alliance Code
- sodium-hydroxide-50-membrane-grade-caustic-soda-lye
- グレード
- Membrane Grade
- 濃度
- 50%
- CAS番号
- 1310-73-2PubChem
- 化学式
- NaOHAdjudicated
- 分子量
- 39.997PubChem
- 製品種別
- Solution
Specifications
| Test | Specification | Typical | Method | Source |
|---|---|---|---|---|
| Assay, sodium hydroxide (NaOH) | 49.5 – 51.5 WT. % | 50.3 WT. % | Titrimetry | Interpreted |
| Sodium Chloride (NaCl) | 100 PPM max. | 23 PPM | Turbidimetry | Interpreted |
| Iron (Fe) | 3 PPM max. | 0.57 PPM | Colorimetry | Interpreted |
| Sodium Carbonate (Na2CO3) | 0.1 WT. % max. | 0.045 WT. % | Titrimetry | Interpreted |
| Sodium chlorate (NaClO3) | 40 PPM | 40 PPM | Ion Chromatography | Interpreted |
| Sodium sulfate (Na2SO4) | 40 PPM | 8.8 PPM | Ion Chromatography | Interpreted |
| Nickel (Ni) | 1.0 PPM Max | 0.21 PPM | ICP-OES | Interpreted |
| Mercury (Hg) | 0.05 PPM Max | 0.0013 PPM | Cold vapor AAS | Interpreted |
| Color (APHA) | Max 20 | 10 | ASTM D1209 (Pt-Co) | 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
| グレード | 濃度 | Typical Assay | SKU | TDS |
|---|---|---|---|---|
| This grade Membrane Grade | 50% | — | current | current |
| ACS Grade | 50% | — | sodium-hydroxide-50-solution-acs-grade | View TDS → |
| ACS | 30% | — | sodium-hydroxide-30-acs-grade | View TDS → |
| Technical | 30% | — | sodium-hydroxide-30-technical-grade | View TDS → |
| — | 25% | — | sodium-hydroxide-25 | View TDS → |
| ACS Grade | 25% | — | sodium-hydroxide-25-acs-grade | View TDS → |
| ACS | 20% | — | sodium-hydroxide-20-acs-grade | View TDS → |
| Technical | 20% | — | sodium-hydroxide-20-technical-grade | View TDS → |
| ACS | 15% | — | sodium-hydroxide-15-acs-grade | View TDS → |
| Technical | 15% | — | sodium-hydroxide-15-technical-grade | View TDS → |
| ACS | 10% | — | sodium-hydroxide-10-acs-grade | View TDS → |
| Technical | 10% | — | sodium-hydroxide-10-technical-grade | View TDS → |
| ACS | 5% | — | sodium-hydroxide-5-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.
物理的及び化学的性質
| Property | 値 | Source |
|---|---|---|
| 外観 | Clear, caustic liquid | Adjudicated |
| 形状 | Liquid solution | Published reference |
| 臭い | Odorless | Adjudicated |
| pH | 13–14 | Adjudicated |
| 比重 | 1.520 - 1.540 | Interpreted |
| 密度 | 1.53 (50% w/w aqueous solution, 20 °C) | Published reference |
| 沸点 | 140–145 °C (284–293 °F) | Adjudicated |
| 融点 | About 10–12 °C (50–54 °F), crystallization point | Adjudicated |
| 引火点 | 該当しない | Adjudicated |
| 蒸気圧 | 1.2 hPa (0.9 mmHg); 6.3 mmHg at 40 °C | Adjudicated |
| Solubility (water) | Completely miscible with water (strongly exothermic) | Adjudicated |
Strong base — hygroscopic; values may drift in opened containers. See storage guidance.
Materials of Construction
| Material | Rating | Conditions | Source |
|---|---|---|---|
| HDPE / polyethylene (bottle, drum) | Compatible | 50-52% (w/w) sodium hydroxide solution as packaged for sale by the supplier; no temperature stated | media.vwr.com |
Compatibility is drawn from published manufacturer and supplier documentation for this product; each rating is sourced. Confirm against your specific duty cycle before equipment selection.
Regulatory & Transport
DOT / 49 CFR
- 国連番号
- UN1824Adjudicated
- 危険有害性クラス
- 8Adjudicated
- 容器等級
- IIAdjudicated
- 正式輸送品名
- Sodium hydroxide solutionAdjudicated
GHS / OSHA HCS 2024
- 注意喚起語
- 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
許容濃度
- OSHA PEL (29 CFR 1910.1000)
- 2 mg/m³ TWAOSHA 29 CFR 1910.1000
- ACGIH TLV
- 2 mg/m³ CeilingAdjudicated
- NIOSH REL
- 2 mg/m³ ceilingNIOSH Pocket Guide
- NIOSH IDLH
- 10 mg/m³NIOSH Pocket Guide
輸送情報は発行時点の49 CFR 172.101の照会結果を反映しています。データ出典：REL/IDLHはNIOSH Pocket Guide、PELはOSHA Zテーブル。出荷に関わる重要な判断の前に、必ず最新の規制本文で確認してください。
Health & Fire Hazard
Acute Toxicology
- LD₅₀ Dermal (rabbit)
- 1350 mg/kgAdjudicated
急性毒性値はSDS第11項またはNIOSH RTECSによる。
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 50% Membrane Grade (Caustic Soda, Lye). 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 | グレード | Conc. | Match | Notes |
|---|---|---|---|---|
| S5881 | ACS Reagent | ≥97% | Unverified candidate | 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.
Applications
- pH adjustment in water treatment; pulp and paper; textile scouring and dyeing; soap and detergent manufacturing; petroleum refining and oil drilling; aluminum processing; chemical synthesisbasekim.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
- 15 °C（59 °F）以上で保管してください。50%の苛性溶液は約12 °C（54 °F）で結晶化します。容器はスチール、ポリエチレンまたはポリプロピレン製を使用し、アルミニウム、亜鉛、スズ、または亜鉛めっき金属は決して使用しないでください。酸類から離して保管してください。Adjudicated
- 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
- 酸類（激しい反応を示す）；アルミニウム、亜鉛、錫、マグネシウムおよびそれらの合金（亜鉛めっき金属を含む）（可燃性水素を発生させる）；有機ハロゲン化合物；ニトロ化合物；可燃性液体；強力な酸化剤。Adjudicated
- Shelf Life
- 36 monthsmedia.vwr.comSource states a 3 year shelf-life for a 50% (w/w) sodium hydroxide solution (BDH reagent grade catalog listing); no storage conditions are stated and the source does not name membrane grade.
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)
UN1824, Sodium hydroxide solution, 8, PG II
Sourced from 49 CFR 172.101. Confirm against shipping documents and carrier requirements before tender.
Revision History
Last reviewed 2026-07-06 by Andre Taki, Chief Commercial Officer, DOT Hazmat–certified (49 CFR 172.704).
| Version | Date | Change | Trigger |
|---|---|---|---|
| 1.5 | 2026-10-07 | Canonical data updated: 3 fields changed via the provenance/adjudication pipeline.
| canonical_change |
| 1.4 | 2026-10-05 | Canonical data updated: 18 fields changed via the provenance/adjudication pipeline.
| canonical_change |
| 1.3 | 2026-09-30 | Canonical data updated: 1 field changed via the provenance/adjudication pipeline.
| canonical_change |
| 1.2 | 2026-07-22 | Canonical data updated: 2 fields changed via the provenance/adjudication pipeline.
| canonical_change |
| 1.1 | 2026-07-06 | Canonical data re-verified: 4 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.