Tetraethyl pyrophosphite

CAS 21646-99-1(C2H5O)2POP(OC2H5)2Chemical Synthesis

Tetraethyl pyrophosphite (CAS 21646-99-1) is an organic phosphorus compound used in chemical synthesis. Its molecular formula is (C2H5O)2POP(OC2H5)2 and it has a molecular weight of 258.19. This chemical serves as a valuable building block in organic chemistry, particularly in the synthesis of other organophosphorus compounds. It is supplied by Tech Serve Solutions with an assay of 96%.

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Tetraethyl pyrophosphite ((C2H5O)2POP(OC2H5)2) — chemical structure, CAS 21646-99-1; Chemistry, fine chemical supplied by Tech Serve Solutions

Building BlocksChemical SynthesisOrganic Building BlocksPhosphorus Compounds

01 /Applications

Preparation of Diethyl Fluorophosphonites

Tetraethyl pyrophosphite has been utilized as a precursor in the synthesis of diethyl fluorophosphonites, highlighting its role in the preparation of specialized organofluorine and organophosphorus compounds.

Organic Synthesis Building Block

As an organic building block, this compound is instrumental in constructing more complex molecular architectures within organic chemistry research and development.

Phosphorus Chemistry

It falls under the category of organic phosphates/phosphites and phosphorus compounds, indicating its utility in reactions involving phosphorus functional groups.

02 /Properties

Molecular weight	258.19
Linear formula	(C2H5O)2POP(OC2H5)2
Assay	96%
Boiling point	79-81 °C/1 mmHg(lit.)
Density	1.057 g/mL at 25 °C(lit.)
Refractive index	n20/D 1.434(lit.)
Application	Tetraethyl pyrophosphite was used in the preparation of diethyl fluorophosphonites1.

03 /Safety & handling

GHS hazard pictogram: Harmful / irritant (GHS07) — Harmful / irritant

Warning

Hazard statements

H315Causes skin irritation
H319Causes serious eye irritation
H335May cause respiratory irritation

Precautionary statements

P261Avoid breathing dust, fume, gas or vapours
P305IF IN EYES

Protective equipment	Eyeshields, full-face respirator (US), Gloves, multi-purpose combination respirator cartridge (US), type ABEK (EN14387) respirator filter
Flash point	113 °C / 235.4 °F
Water hazard class (WGK, DE)	3
Hazard codes (EU)	Xi
Risk statements (R)	36/37/38
Safety statements (S)	26-36

Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.

04 /Identifiers & registry

CAS number

21646-99-1

MDL number

MFCD00009082

PubChem substance

24849530

05 /Quality & supply

Documentation

Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets 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.

06 /Frequently asked questions

What is Tetraethyl pyrophosphite used for?

Tetraethyl pyrophosphite is primarily used as a building block in chemical synthesis, notably in the preparation of diethyl fluorophosphonites.

What is the CAS number and formula for Tetraethyl pyrophosphite?

The CAS number for Tetraethyl pyrophosphite is 21646-99-1, and its linear formula is (C2H5O)2POP(OC2H5)2.

What is the purity of Tetraethyl pyrophosphite offered by TSS?

Tech Serve Solutions supplies Tetraethyl pyrophosphite with a minimum assay of 96%.

What are the main hazards associated with Tetraethyl pyrophosphite?

Tetraethyl pyrophosphite is classified with GHS07 symbol and a warning signal word. It causes skin irritation (H315), serious eye irritation (H319), and may cause respiratory irritation (H335). Appropriate personal protective equipment, including eyeshields and gloves, should be used.

How is Tetraethyl pyrophosphite supplied and exported?

As a global supplier and exporter, Tech Serve Solutions provides Tetraethyl pyrophosphite packaged and shipped according to international regulations for chemical substances.