Bis(dinacolato)diboron
CAS 73183-34-3
EC 615-925-0
Formula C12H24B2O4
MW 253.94 g/mol
Organometallic Compounds Pharmaceuticals & HealthcarePlastics & PolymersTextile, Leather & Paper Flame RetardancyPreservation & BiocideAntioxidant & StabilizerpH Regulation & Buffering
Description
Bis(dinacolato)diboron, commonly abbreviated as B2Pin2 and also known as pinacol diborane or diboron pinacol ester (CAS 73183-34-3), is a diboron compound consisting of two pinacolato-coordinated boron centres. It carries no assigned E-code and is classified under HS code 29209090.
In polymer and textile processing, B2Pin2 functions as a flame retardant by releasing boron-containing species under thermal stress that interfere with combustion chain reactions. It also serves as an oxidising agent and heat stabiliser in plastics formulations, where it moderates degradation pathways at elevated processing temperatures.
B2Pin2 is supplied as a white crystalline powder or platelet solid and is available in technical and pharmaceutical-grade specifications. The substance is registered under REACH and procurement should confirm current SVHC status and SDS documentation. Standard packaging formats include multi-layer bags and fibre drums suited to moisture-sensitive materials.
In polymer and textile processing, B2Pin2 functions as a flame retardant by releasing boron-containing species under thermal stress that interfere with combustion chain reactions. It also serves as an oxidising agent and heat stabiliser in plastics formulations, where it moderates degradation pathways at elevated processing temperatures.
B2Pin2 is supplied as a white crystalline powder or platelet solid and is available in technical and pharmaceutical-grade specifications. The substance is registered under REACH and procurement should confirm current SVHC status and SDS documentation. Standard packaging formats include multi-layer bags and fibre drums suited to moisture-sensitive materials.
Physical Properties
| Melting Point | 139-140 °C |
| Boiling Point | 222.6±7.0 °C(Predicted) |
| Density | 0.98 |
| Appearance | white crystal powder |
| Color | White |
| Form | Powder or Platelets |
| Water Solubility | Soluble in tetrahydrofuran, dichloromethane, toluene, hexane and heptane. Insoluble in water. |
Safety & Handling (Learn More)
Danger GHS05 GHS07
H
H302H314H315H317H319H332H335
P
P260P261P264P270P271P272P280P316P317P319P321P330P363P405P501P264+P265P301+P317P302+P352P304+P340P332+P317P333+P317P337+P317P362+P364P403+P233P301+P330+P331P302+P361+P354P305+P351+P338P305+P354+P338
Trade & Regulatory
| HS Code | 29209090 |
| Storage Class | 11 - Combustible Solids |
| WGK (Germany) | 3 |
Other Names
B2Pin2bis(pinacolato)diboronBis(pinacolato)diboranePinacol diboraneDIBORON PINACOL ESTER
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Raw Materials
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