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Chemical structure of Diphenyl phosphate | 838-85-7
CAS: 838-85-7
SKU: S1491
Diphenyl phosphate | SKU: S1491
Synonyms: Diphenyl hydrogen phosphate
Chemical structure of Diphenyl phosphate | 838-85-7
Diphenyl Phosphate is an organophosphate compound that Sarchem Labs supplies as a white crystalline solid for flame-retardant precursor manufacturing, polymer catalysis, and organic synthesis applications. As an effective Brønsted acid organocatalyst, it’s increasingly used in ring-opening and cationic polymerization chemistry alongside its traditional role in phosphate-ester manufacturing. Every lot ships with a Certificate of Analysis and Safety Data Sheet.
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Specifications

Melting Point62–66°C (lit.)
ColorWhite
Linear Formula(C6H5O)2P(O)OH
Formula Weight250.19
Physical FormCrystal-powder
Chemical Name or MaterialDiphenyl Phosphate
Molecular Weight250.19 g/mol
SMILES StringOP(=O)(Oc1ccccc1)Oc2ccccc2
CAS Number838-85-7
EC Number212-657-2
NACRESNA.22
PubChem Substance ID24888299
UNSPSC Code12352100
MDL NumberMFCD00003033
InChI1S/C12H11O4P/c13-17(14,15-11-7-3-1-4-8-11)16-12-9-5-2-6-10-12/h1-10H,(H,13,14)
InChI KeyASMQGLCHMVWBQR-UHFFFAOYSA-N
Beilstein/REAXYS Number1379164
Quality Level200
Reference Assay99%
ApplicationsFlame-retardant and plasticizer precursor manufacturing (organophosphate chemistry)

Applications

Flame-retardant and plasticizer precursor manufacturing (organophosphate chemistry)
Organocatalyst for ring-opening polymerization of renewable lactones
Living cationic polymerization initiator system (with zinc iodide) for vinyl ether monomers
Environmental analytical chemistry (organophosphate flame-retardant metabolite research)

Product Description

What is Diphenyl Phosphate?

Diphenyl Phosphate is a phosphate diester in which two phenyl groups are attached to a phosphoric acid core, leaving one acidic hydroxyl group. That remaining acidic proton makes it a moderately strong Brønsted acid, useful both as a synthetic intermediate toward more fully substituted phosphate esters (common flame retardants and plasticizers) and, on its own, as an organocatalyst for select polymerization reactions.

Uses of Diphenyl Phosphate

In industrial and polymer chemistry, diphenyl phosphate serves as a precursor in flame-retardant and plasticizer manufacturing, and as an effective organocatalyst for ring-opening polymerization of renewable δ-lactones. Combined with zinc iodide, it forms an initiating system for living cationic polymerization of vinyl ether monomers such as isobutyl vinyl ether. It’s also a compound of interest in environmental analytical chemistry, where organophosphate flame-retardant metabolites (including diphenyl phosphate) are monitored in occupational and environmental exposure studies.

Safety Information

*This reference listing carries no GHS hazard pictogram or hazard statement — it is not classified as GHS-hazardous.*

  • Storage Class: 11 – Combustible Solids
  • PPE: Eyeshields, gloves, dust mask (type N95) as standard good-handling practice

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FAQs: Diphenyl phosphate

Mainly as a precursor in flame-retardant and plasticizer manufacturing, and as a catalyst/initiator-system component in ring-opening and cationic polymerization chemistry.

It's a member of the organophosphate ester family used in flame-retardant and plasticizer manufacturing — related organophosphate esters are commonly monitored in environmental exposure studies, which is a separate context from Sarchem's synthesis-grade material.

Sigma's reference listing carries no GHS hazard classification; standard laboratory PPE is recommended as routine good practice.

(C6H5O)2P(O)OH, molecular weight 250.19 g/mol.

Yes, for every lot (SKU S1491).