4,4′-Oxybis(phenyl isocyanate)
4,4′-Oxybis(phenyl isocyanate) (CAS 4128-73-8), molecular formula O(C6H4NCO)2, is a high-purity chemical supplied by Tech Serve Solutions for chemical synthesis applications, to pharmacopoeia specification (USP, BP, EP). Every batch is tested and ships with a Certificate of Analysis; MSDS and technical data sheets are available on request. Tech Serve Solutions has supplied laboratory reagents, fine chemicals and pharmaceutical intermediates worldwide since 1998.
| Molecular weight | 252.22 |
|---|---|
| Linear formula | O(C6H4NCO)2 |
| Assay | 96% |
| Boiling point | 196 °C/5 mmHg(lit.) |
| Melting point | 64-68 °C(lit.) |
Hazard statements
- H301Toxic if swallowed
- H312Harmful in contact with skin
- H315Causes skin irritation
- H317May cause an allergic skin reaction
- H319Causes serious eye irritation
- H330Fatal if inhaled
- H334May cause allergy or asthma symptoms if inhaled
- H335May cause respiratory irritation
Precautionary statements
- P260Do not breathe dust, fume, gas, mist, vapours or spray
- P280Wear protective gloves, clothing and eye/face protection
- P284Wear respiratory protection
- P301IF SWALLOWED
- P305IF IN EYES
- P310Immediately call a POISON CENTER or doctor
| Protective equipment | dust mask type N95 (US), Eyeshields, Gloves |
|---|---|
| Transport (UN / ADR) | UN 2811 6.1 / PGIII |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | T+ |
| Risk statements (R) | 21-25-26-36/37/38-42/43 |
| Safety statements (S) | 22-26-28-36/37-45 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
Documentation
Supplied to USP, BP and EP standards. Every batch ships with a Certificate of Analysis (assay, identity, purity); MSDS and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is 4,4′-Oxybis(phenyl isocyanate)?
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4,4′-Oxybis(phenyl isocyanate) (CAS 4128-73-8), molecular formula O(C6H4NCO)2, is a high-purity chemical supplied by Tech Serve Solutions for chemical synthesis applications, to USP, BP and EP standards.
What grades of 4,4′-Oxybis(phenyl isocyanate) does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 4,4′-Oxybis(phenyl isocyanate) in USP, BP, EP and reagent/AR grades. Custom specifications for nutraceutical or specialty pharmaceutical applications are available — contact our technical sales team.
What is the CAS number and molecular formula of 4,4′-Oxybis(phenyl isocyanate)?
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4,4′-Oxybis(phenyl isocyanate) has CAS number 4128-73-8 and molecular formula O(C6H4NCO)2. Full specifications appear in the table above and in the Certificate of Analysis.
What is the typical minimum order quantity and lead time for 4,4′-Oxybis(phenyl isocyanate)?
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Sample quantities are available for technical evaluation; bulk MOQ depends on grade and packaging. In-stock material typically ships in 7–10 working days; custom-spec orders take 3–4 weeks. Tech Serve Solutions ships worldwide with full export documentation.
Do you provide a Certificate of Analysis (CoA) with each shipment?
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Yes. Every batch of 4,4′-Oxybis(phenyl isocyanate) ships with a Certificate of Analysis covering assay, identity and purity tests, plus pharmacopoeia conformance where applicable. MSDS and TDS documents are available on request before order placement.
How should 4,4′-Oxybis(phenyl isocyanate) be stored?
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Store 4,4′-Oxybis(phenyl isocyanate) in its original sealed container in a cool, dry place away from direct sunlight and incompatible materials, in line with the storage guidance on the Safety Data Sheet. Reseal between dispensings.
What is 4,4′-Oxybis(phenyl isocyanate) used for?
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4,4′-Oxybis(phenyl isocyanate) is used in chemical synthesis applications across pharmaceutical, research and industrial settings. Our technical team can advise on suitability for your specific process.
How do I request a quote for 4,4′-Oxybis(phenyl isocyanate)?
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Request a quote with your required grade, quantity and destination via https://www.techservesolutions.in/contact or email info@techservesolutions.in. We respond with specifications, a Certificate of Analysis and pricing.
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