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Phosphorous acid, tris(methylphenyl) ester
Also known as: Tris(methylphenyl) phosphite · Phosphorous acid, tris(methylphenyl) ester · 25586-42-9 · 3YVP05131V
- CAS No.
- 25586-42-9
- Formula
- C21H21O3P
- Molar mass
- 352.4 g/mol
- PubChem CID
- 12106
Corrosive
Harmful / Irritant
Summary
Phosphorous acid, tris(methylphenyl) ester (C21H21O3P), CAS 25586-42-9. Common in labs and industry. Read on for hazards, storage, PPE and mixing rules.
Background
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Physical properties
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Hazards
Storage
Keep at room temperature, below 30 °C, out of direct heat.
Store somewhere well-ventilated and away from any ignition source.
Metal drums or tinted glass, tightly sealed.
Strong acids, strong bases and powerful oxidizers.
Personal protective equipment
Nitrile or butyl, at least 0.4 mm thick.
Safety goggles with side shields.
A2 organic-vapor cartridge if the room isn't well ventilated.
Occupational exposure limits (HSE)
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EU harmonised classification (ECHA C&L)
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Transport
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Open comparator with Phosphorous acid, tris(methylphenyl) esterPractical safety notes
- Corrosive. Wear chemical goggles, faceshield and chemical-resistant gloves. Have an eyewash within reach.
- Irritant / harmful. Ventilate the workspace and avoid skin contact.
Derived from the GHS classification shown above. These notes are generic guidance and do not replace the manufacturer's SDS or your local risk assessment.
FAQ
Is Phosphorous acid, tris(methylphenyl) ester flammable?+
Phosphorous acid, tris(methylphenyl) ester (CAS 25586-42-9) does not carry the GHS02 flame pictogram in our records. Always confirm with the manufacturer's SDS section 9 (flash point) before assuming a product is non-flammable.
What PPE should I wear when handling Phosphorous acid, tris(methylphenyl) ester?+
Chemical-splash goggles and a faceshield, chemical-resistant gloves (nitrile or butyl) and an apron are the minimum. Ventilation should be sufficient to keep vapours below the occupational exposure limit. Check SDS section 8 for material-specific breakthrough times.
How should Phosphorous acid, tris(methylphenyl) ester be stored?+
Store Phosphorous acid, tris(methylphenyl) ester (CAS 25586-42-9) in tightly closed original containers, in a cool, dry, well-ventilated area away from incompatible materials. Segregate acids from bases and keep away from metals that can be attacked.
Is Phosphorous acid, tris(methylphenyl) ester dangerous for the environment?+
No specific environmental pictogram (GHS09) is listed in our records for Phosphorous acid, tris(methylphenyl) ester, but any chemical waste should be handled through your site's hazardous-waste procedure, not poured down the drain.
Where can I find the official Safety Data Sheet for Phosphorous acid, tris(methylphenyl) ester?+
Official, up-to-date SDS documents are published by each manufacturer (Sigma-Aldrich, Merck, Thermo Fisher, VWR, Carl Roth, etc.) and by regulators such as ECHA and NIOSH. This page is an educational summary and does not replace the manufacturer's SDS.
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