methyltriphenyl-phosphoniubromide

methyltriphenyl-phosphoniubromide - Names and Identifiers

Name	Methyltriphenylphosphonium bromide
Synonyms	bromomethane Methyl triphenyl pho triphenylphosphonium Methyltriphenylphosphine bromide methyltriphenyl-phosphoniubromide Bromo(methyl)triphenylphosphorane MethyltriphenylphosphoniumBromide METHYLTRIPHENYLPHOSPHONIUM BROMIDE TRIPHENYLMETHYLPHOSPHONIUM BROMIDE Triphenylmethylphosphonium Bromide Methyltriphenylphosphonium bromide Methyl Triphenylphosphonium Bromide (Methyl)triphenylphosphonium bromide Methyl Triphenyl Phosphonium Bromide Methyltriphenyl phosphorniuM broMide Phosphonium,methyltriphenyl-,bromide Phosphonium, methyltriphenyl-, bromide
CAS	1779-49-3
EINECS	217-218-9
InChI	InChI=1/C18H15P.CH3Br/c1-4-10-16(11-5-1)19(17-12-6-2-7-13-17)18-14-8-3-9-15-18;1-2/h1-15H;1H3/p+1
InChIKey	LSEFCHWGJNHZNT-UHFFFAOYSA-M

methyltriphenyl-phosphoniubromide - Physico-chemical Properties

Molecular Formula	C19H18BrP
Molar Mass	357.22
Melting Point	230-234 °C (lit.)
Flash Point	>240°C
Water Solubility	400 g/L (25 ºC)
Solubility	H2O: 0.1g/mL, clear
Vapor Presure	0.0000002 hPa
Appearance	White powder
Color	White
BRN	3599467
PH	6.0-6.5 (400g/l, H2O, 20℃)
Storage Condition	Inert atmosphere,Room Temperature
Sensitive	Hygroscopic
MDL	MFCD00011804
Physical and Chemical Properties	White crystals. Melting point 234-235 °c.
Use	for organic synthesis.

methyltriphenyl-phosphoniubromide - Risk and Safety

Risk Codes	R20/21/22 - Harmful by inhalation, in contact with skin and if swallowed. R36/37/38 - Irritating to eyes, respiratory system and skin.
Safety Description	S36/37 - Wear suitable protective clothing and gloves. S36 - Wear suitable protective clothing. S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.
UN IDs	UN 1390 4.3/PG 2
WGK Germany	3
TSCA	T
HS Code	29310095
Hazard Class	6.1
Packing Group	III
Toxicity	LD50 orally in Rabbit: 118 mg/kg

methyltriphenyl-phosphoniubromide - Introduction

Solubility in water: 400g/L (25°C), methanol solubility: 950g/L (20°C), soluble in fatty alcohol and chloroform, actually insoluble in aromatic hydrocarbons and acetone.

Last Update：2022-10-16 17:14:29

methyltriphenyl-phosphoniubromide - Reference Information

LogP	-1.18
NIST chemical information	Information provided by: webbook.nist.gov (external link)
EPA chemical information	Information provided by: ofmpub.epa.gov (external link)
introduction	methyl triphenylphosphine bromide is a solid quaternary phosphonium salt flame retardant. At present, halogen-containing flame retardants are widely used organic flame retardants with excellent flame retardant properties. However, when a fire occurs, halogen-containing flame retardants will release a large amount of smoke and toxic hydrogen halide gas, causing secondary hazards. With the promulgation of the EU RoHs and WEEE directives, the application of organic halogen-containing flame retardants in the fields of electronic and electrical equipment has been restricted. Therefore, the development of high-efficiency halogen-free flame retardants has become a very important topic.
Application	Methyl triphenylphosphine bromide can be used as a Wittig reagent for the preparation of alkenes and increase the carbon number of unsaturated carbon chains. The Ylide precursor of Wittig reaction is widely used in the synthesis of unsaturated bonds in liquid crystal materials. It is also widely used in organic synthesis. It is a good cationic phase conversion catalyst.
preparation	triphenylphosphine (0.0035mol), ammonium bromide (0.00355mol) and trimethyl orthoformate (1.5ml) were added to the two-neck flask in sequence, and stirrers were added. Heat reflux at 110 ℃ for 12 hours. After the reaction is completed, cool to room temperature, evaporate under reduced pressure to remove the solvent, and recrystallize with dichloromethane, ethyl acetate and petroleum ether. The obtained solid was washed with ethyl acetate and petroleum ether, and the white solid obtained after suction filtration was moved to a vacuum oven at 60°C for overnight drying to obtain a solid quaternary phosphonium salt flame retardant methyl triphenylphosphine bromide.
use	for organic synthesis. Wittig reagent, used to prepare alkenes and increase the carbon number of unsaturated carbon chains. The Ylide precursor of Wittig reaction is widely used in the synthesis of unsaturated bonds in liquid crystal materials. It is also widely used in organic synthesis. It is a good cationic phase conversion catalyst. Using the Wittig reaction, it is widely used in the methylene reaction; the Wittig alkylene salt, after closed-loop metathesis, is used to synthesize an alkyne that can provide a benzonitrogen heterocyclic system Wittig alkylene salt, recently used to synthesize alkyne, through the ring-closing metathesis reaction to generate benzozazepine ring system. Widely used in methylene through Wittig reaction.
production method	dissolve 55g of triphenylphosphine in 45ml of dried benzene, cool, add 28g of pre-cooled methyl bromide, and leave it at room temperature for 2 days after sealing. Then 500ml of hot benzene is mixed with the reaction mixture, the white solid is filtered and dried to obtain 70g of methyl triphenylphosphorus bromide. 99% yield.
spontaneous combustion temperature	410°C

Last Update：2024-04-10 22:29:15

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methyltriphenyl-phosphoniubromide

Methyltriphenylphosphonium bromide

CAS: 1779-49-3

Molecular Formula: C19H18BrP

methyltriphenyl-phosphoniubromide - Names and Identifiers

methyltriphenyl-phosphoniubromide - Physico-chemical Properties

methyltriphenyl-phosphoniubromide - Risk and Safety

methyltriphenyl-phosphoniubromide - Introduction

methyltriphenyl-phosphoniubromide - Reference Information

Supplier List

methyltriphenyl-phosphoniubromide Request for Quotation

Methyltriphenylphosphonium bromide

CAS: 1779-49-3

Molecular Formula: C19H18BrP

methyltriphenyl-phosphoniubromide - Names and Identifiers

methyltriphenyl-phosphoniubromide - Physico-chemical Properties

methyltriphenyl-phosphoniubromide - Risk and Safety

methyltriphenyl-phosphoniubromide - Introduction

methyltriphenyl-phosphoniubromide - Reference Information

Supplier List

methyltriphenyl-phosphoniubromide