CAS 17857-14-6 corresponds to (3-carboxypropyl) triphenylphosphonium bromide, which is a quaternary phosphonium salt organic synthesis intermediate containing carboxyl functional groups. Its molecular formula is C ₂₂ H ₂ BrO ₂ P and its molecular weight is 429.29.

Core physical and chemical properties
-Chinese name: (3-carboxypropyl) triphenylphosphonium bromide (alias: 3-carboxypropyl triphenylphosphonium bromide)
-English name: (3-Carboxypropyl) triphenylphosphonium bromide
-Molecular formula/weight: C ₂₂ H ₂₂ BrO ₂ P/429.29
-Appearance: White to off white crystalline powder or granules, hygroscopic
-Melting point: 244-247 ° C (decomposition)
-Solubility: soluble in polar solvents such as methanol, difficult to dissolve in non-polar organic solvents
-Storage conditions: Keep away from light, dry, and sealed to prevent moisture absorption and degradation

Main purpose and safety tips
-Application areas: As a triphenylphosphine derivative, it is widely used in organic synthesis (such as Wittig reaction modification), drug delivery system construction (such as anti-tumor drug carriers), and functional material synthesis.
-Safety hazards: GHS classification includes skin irritants (Category 2) and eye irritants (Category 2A); Contact can cause irritation. Wear protective goggles and gloves during operation to avoid inhaling dust.
-Emergency response: Immediately rinse with clean water and seek medical attention if in contact with the eyes; Leaks must be disposed of in accordance with chemical waste regulations, and direct discharge into water bodies is prohibited.

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(3-Carboxypropyl)triphenylphosphonium bromide CAS 17857-14-6
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