Benzyltriphenylphosphonium Bromide (BTPPB) CAS 1449-46-3

Identity and specification

BTPPB is an ionic phosphonium bromide salt. Base treatment can form the corresponding ylide for carbon-carbon bond construction. Identity and suitability should be evaluated from the salt assay, counterion, water and reaction-specific impurity profile.

Quality controls for purchasing

• Specify assay by the agreed method and confirm bromide or counterion identity.
• Set limits for water, residual triphenylphosphine, triphenylphosphine oxide, benzyl bromide and related phosphonium salts.
• Define particle size, color and dissolution behavior when charging or reaction rate is sensitive.

Applications and grade selection

BTPPB is mainly evaluated as a Wittig reagent precursor for installing a benzylidene unit after controlled ylide formation. Conversion depends on base, solvent, water, temperature and substrate. A representative sample should be tested in the intended reaction and workup.

For a related phase-transfer catalyst, see Tetrabutylammonium Bromide.

Storage and handling

Keep tightly sealed in a dry area and protect from moisture, strong oxidizers and incompatible bases. Use a moisture-resistant liner, control dust during transfer and follow the current SDS for handling, spill response and disposal.

Documentation and quotation details

State assay, water and impurity limits, particle preference, test methods, trial or bulk quantity, packaging, destination and schedule. Request a lot COA, current SDS and available technical or origin documents before order approval.