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CAS 865-33-8 Potassium methoxide
Overview
Potassium Methoxide (potassium methanolate; CAS 865-33-8, CH₃OK, ~70.13 g/mol) is a strong alkoxide base widely used in biodiesel methyl-ester production, pharmaceuticals, agrochemical intermediates, polymer modification, and fine chemicals. As a high-activity base and transesterification catalyst, it accelerates ester exchange, condensation (e.g., Claisen/Knoevenagel), E2 eliminations, and selective deprotonation/alkylation under anhydrous conditions. Supplied as a methanolic solution (typically 25–32% w/w) or low-carbonate solid, it offers excellent compatibility in MeOH systems;
Product Description
CAS 865-33-8 Potassium methoxide
Potassium methoxide is a versatile alkoxide base widely applied in organic synthesis, biodiesel methyl-ester production, polymer modification, pharmaceuticals, and fine chemicals. As a strong base and high-efficiency transesterification catalyst, it accelerates ester exchange, condensation (Claisen/Knoevenagel), E2 eliminations, and selective deprotonation/alkylation with fast, clean kinetics. Offered as 25–32% w/w methanolic solutions or low-carbonate solids, it provides high basicity, excellent compatibility in MeOH systems, and—in certain processes—favorable solubility/phase behavior versus sodium analogs, enabling cost-effective scale-up from R&D to continuous production.
Potassium Methoxide (Potassium Methanolate) — Product Specification
CAS: 865-33-8 | Formula: CH₃OK | Molecular weight: ~70.13 g/mol | Synonyms: Potassium methanolate; KOMe
Identity & Form
| Product form | Low-carbonate solid (powder/flakes) or methanolic solution |
|---|---|
| Typical solution concentrations | 25–32% w/w in methanol (custom on request) |
| Assay / Active base | Titration (reported on COA); solution concentration tolerance typically ±1.0% (abs.) |
| Stabilizers | None added |
| Documents | COA · TDS · SDS · DG documents |
Solution Grade — 30% w/w in Methanol (example)
| Appearance | Clear, colorless to slightly yellow liquid; free from visible particulates |
|---|---|
| Assay (as CH₃OK) | 30.0% ± 1.0% (acid–base titration) |
| Methanol content | Balance (approx. 70% w/w) |
| Free alkali (as KOH) | ≤ 0.50% (w/w) |
| Potassium carbonate (K₂CO₃) | ≤ 0.50% (w/w) |
| Water (Karl Fischer) | ≤ 0.30% (w/w) |
| Color (APHA) | ≤ 50 |
Solid Grade — Powder/Flakes (example)
| Appearance | White to off-white, free-flowing powder or flakes |
|---|---|
| Assay (as CH₃OK) | ≥ 95.0% (typical commercial grade) |
| Potassium hydroxide (KOH) | ≤ 3.0% |
| Potassium carbonate (K₂CO₃) | ≤ 2.0% |
| Water | ≤ 1.0% |
Applications & Handling
| Main uses | Transesterification (biodiesel methyl ester), base-catalyzed condensation/alkylation, pharma/agro intermediates, polymer modification |
|---|---|
| Handling | Moisture- and CO₂-sensitive; corrosive. Solution grade contains flammable methanol—ensure ventilation and ignition control. Operate in dry, inert conditions with appropriate PPE. |
| Storage | Tightly closed under dry inert atmosphere; keep cool and away from water/acids/oxidants. |
Packaging & Logistics
| Solution (25–32%) | 200 L drums · 1000 L IBC (custom on request) |
|---|---|
| Solid (powder/flakes) | 25 kg drums/bags with protective liner (custom packing on request) |
| Ports | Qingdao · Shanghai · Tianjin |
| To quote (please specify) | Grade (solution % or solid), pack size, destination country/port, and required documents |
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PACKING AND DELIVERY
Packing and delivery
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