15171-48-9

Basic information

• Product Name: 2-METHYL-1,2-OXAPHOSPHOLAN-5-ONE 2-OXIDE
• Synonyms: 2-METHYL-1,2-OXAPHOSPHOLAN-5-ONE 2-OXIDE;2-Methyl-1,2-oxaphospholane 5-one 2-oxide;2-Methyl-1,2-oxaphospholane-5-one 2-oxide;2-Methyl-5-oxo-1,2-oxaphospholane 2-oxide;Einecs 239-225-6;2-Methyl-1-oxa-2,5-dioxo-2-phospholane;Exolit PE 110;Exolit PR 110
• CAS NO: 15171-48-9
• Molecular Formula: C₄H₇O₃P
• Molecular Weight: 134.07
• EINECS: 239-225-6
• Product Categories: New phosphonium flame-retardant agents
• Mol File: 15171-48-9.mol

Chemical Properties

• Melting Point: 97-98℃
• Boiling Point: 192℃
• Flash Point: 84℃
• Appearance: /
• Density: 1.26
• Vapor Pressure: 0.511mmHg at 25°C
• Refractive Index: 1.426
• CAS DataBase Reference: 2-METHYL-1,2-OXAPHOSPHOLAN-5-ONE 2-OXIDE(CAS DataBase Reference)
• NIST Chemistry Reference: 2-METHYL-1,2-OXAPHOSPHOLAN-5-ONE 2-OXIDE(15171-48-9)
• EPA Substance Registry System: 2-METHYL-1,2-OXAPHOSPHOLAN-5-ONE 2-OXIDE(15171-48-9)

Safety Data

• Hazardous Substances Data: 15171-48-9(Hazardous Substances Data)

Usage

Uses

2-Methyl-1,2-oxaphospholan-5-one 2-oxide is a fireproofing agent, it can also be used as a building block for organic synthesis.

InChI:InChI=1/C4H7O3P/c1-8(6)3-2-4(5)7-8/h2-3H2,1H3

Upstream product

• 676-83-5 methyldichlorophosphane 
• 79-10-7 acrylic acid 
• 125750-80-3 dichloro-methyl-phosphane 

Downstream Products

• 15208-84-1 (2-Phenylcarbamoyl-ethyl)-methyl-phosphinsaeure 
• 625-36-5 2-chloropropionyl chloride 
• 15090-23-0 2-carboxyethyl-methyl-phosphinic acid 

Relevant articles and documents

Salt of carboxyethyl phosphinate ester and flame retardant thermoplastic resin composition containing the same

A composition includes a salt of a carboxyethyl phosphinate ester compound. Additionally, the composition may also include a polymeric resin, such as a thermoplastic resin. The composition may have improved physical and chemical properties including flame retardancy, thermal stability, and hygroscopicity.

Process for preparing 1,2-oxa-phospholanes

Preparation of 2,5-dioxo-1,2-oxa-phospholanes having general formula (I) STR1 wherein R1 represents an alkyl group being optionally substituted and having up to 18 carbon atoms, a cycloalkyl group having up to 8 carbon atoms, an alkenyl group having up to 8 carbon atoms, an aryl group having up to 14 carbon atoms being possibly substituted by lower alkyl groups, by alkoxy groups, by halogen or by lower alkyl radicals, by alkylated or dialkylated amino groups, or which represents an aralkyl group having up to 15 carbon atoms and being possibly substituted in the same way as the aryl group, Wherein R2 stands for a lower alkyl group or hydrogen and R3 stands for a lower alkyl radical, a phenyl radical being possibly substituted by halogen or lower alkyl groups, for a benzyl radical or for hydrogen.

Process for the simultaneous preparation of 2,5-dioxo-1,2-oxa-phospholanes and β-halogenpropionic acid halide

2,5-Dioxo-1,2-oxa-phospholanes of the formula (I) STR1 wherein R1 is an organic radical and R2 and R3 each also represents an organic radical or hydrogen, are prepared by reacting 2-haloformylethyl-phosphinic acid halides of the formula (II) STR2 wherein R1, R2 and R3 are defined as in formula (I) and X means Cl or Br, preferably Cl, with an approximatey equimolar quantity of acrylic acid. The compounds (II) may also be produced in the reaction batch and in situ by reacting about equimolar quantities of a dihalophosphine of the formula (III) STR3 with an α,β-unsaturated acid (IV) In the formulae (III) and (IV) R1, R2, R3 and X are defined as indicated above. In the reaction there is formed, in addition to the compounds (I), practically exclusively β-halopropionic acid and no free hydrogen halide. The phospholanes (I) are valuable flame retarding agents for plastics, intermediates, for example, for the synthesis of biocidals etc.

Process for preparing 1,2-oxa-phospholanes

Preparation of 2,5-dioxo-1,2-oxa-phospholanes of the formula (I) STR1 wherein R1 represents an optionally substituted alkyl having up to 18 carbon atoms, a cycloalkyl radical having up to 8 carbon atoms, an alkylene radical having up to 8 carbon atoms, an aryl radical having up to 14 carbon atoms which may be substituted by lower alkyl groups, lower alkoxy groups, halogen or by amino groups alkylated or dialkylated by lower alkyl groups, or an aralkyl radical having up to 15 carbon atoms which may be substituted in an analogous manner as the aryl radical, R2 represents a lower alkyl radical or hydrogen and R3 represents an alkyl radical having up to 6 carbon atoms, a phenyl radical which may be substituted by halogen or by lower alkyl groups, a benzyl radical or hydrogen, by reacting 2-halogenoformylethylphosphonic acid halides of the formula (II) STR2 wherein R1, R2 and R3 are defined as in formula (I) and X represents chlorine or bromine, with approximately an equimolar quantity of water or one phosphinic-carboxylic acid of the formula (II), wherein both radicals X represent OH-groups.