IUPAC Name: (5-hydroxy-5-oxopentyl)-triphenylphosphanium bromide
The MF of (4-Carboxybutyl)triphenylphosphonium Bromide(17814-85-6): C₂₃H₂₄BrO₂P
The MW of (4-Carboxybutyl)triphenylphosphonium Bromide(17814-85-6): 443.31
EINECS: 241-782-5
mp: 204-207 °C(lit.)
Sensitive: Hygroscopic
Appearance: White to off-white powder.
Solubility in water: Insoluble
Categories: API intermediates;Miscellaneous Compounds;Phosphonium Compounds;Synthetic Organic Chemistry;Wittig & Horner-Emmons Reaction;Wittig Reaction;C-C Bond Formation;Olefination;Wittig Reagents
Synonyms: (4-CARBOXYBUTYL)TRIPHENYLPHOSPHONIUM BROMIDE;CBT;(4-carboxybutyl)triphenyl-phosphoniubromide;Phosphonium, (4-carboxybutyl)triphenyl-, bromide;4-CARBOXYBUTYLTRIPHENYLPHOSPHONIUM BROMIDE 98%;(4-Carboxybutyl)triphenylphosphonium bromide, 98 %;(5-Hydroxy-5-oxopentyl)-triphenylphosphanium bromide
The Structure of (4-Carboxybutyl)triphenylphosphonium Bromide(17814-85-6):

Hazard Codes: Xi
Risk Statements: 36/37/38
36/37/38:  Irritating to eyes, respiratory system and skin 
Safety Statements: 26-36
26:  In case of contact with eyes, rinse immediately with plenty of water and seek medical advice 
36:  Wear suitable protective clothing 
RIDADR: 3278
WGK Germany: 3
HS Code: 29310095

1. First Aid Measures
Ingestion:
Never give anything by mouth to an unconscious person. Get medical aid. Do NOT induce vomiting. If conscious and alert, rinse mouth and drink 2-4 cupfuls of milk or water.
Inhalation:
Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid.
Skin:
Get medical aid. Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Wash clothing before reuse.
Eyes:
Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid.
2. Handling and Storage
Storage:
Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances.
Handling:
Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Use with adequate ventilation. Avoid contact with eyes, skin, and clothing. Keep container tightly closed. Avoid ingestion and inhalation.