This chemical is called Allyltriphenylphosphonium bromide, and it can also be named as phosphonium, triphenyl-2-propen-1-yl-, bromide (1:1). With the molecular formula of C₂₁H₂₀P^.Br, its molecular weight is 383.27. The CAS registry number of this chemical is 1560-54-9, and its product categories are Pharmaceutical Intermediates; Phosphonium Compounds; Synthetic Organic Chemistry; Wittig & Horner-Emmons Reaction; Wittig Reaction; C-C Bond Formation; Olefination; Wittig Reagents. In addition, this chemical is white crystalline powder.

Other characteristics of the Allyltriphenylphosphonium bromide can be summarised as followings: (1)H-Bond Donor: 0; (2)H-Bond Acceptor: 1; (3)Rotatable Bond Count: 5; (4)Exact Mass: 382.0486; (5)MonoIsotopic Mass: 382.0486; (6)Topological Polar Surface Area: 0; (7)Heavy Atom Count: 23; (8)Formal Charge: 0; (9)Complexity: 284; (10)Isotope Atom Count: 0; (11)Defined Atom StereoCenter Count: 0; (12)Undefined Atom StereoCenter Count: 0; (13)Defined Bond StereoCenter Count: 0; (14)Undefined Bond StereoCenter Count: 0; (15)Covalently-Bonded Unit Count: 2.

Production method of this chemical: The Allyltriphenylphosphonium bromide could be obtained by the reactants of 3-bromo-propene and triphenylphosphane. This reaction needs the solvent of toluene. The yield is 91 %. In addition, this reaction should be taken for 3 hours, and the other condition is heating.

Uses of this chemical: The Allyltriphenylphosphonium bromide could react with furfural, and obtain the 2-buta-1,3-dienyl-furan. This reaction needs the reagent of K₂CO₃, and the solvent of toluene. The yield is 87 %. In additon, this reaction should be taken for 4 hours, and the other condition is heating.

You can still convert the following datas into molecular structure: 
1.SMILES: [Br-].C(=C)\C[P+](c1ccccc1)(c2ccccc2)c3ccccc3
2.InChI: InChI=1/C21H20P.BrH/c1-2-18-22(19-12-6-3-7-13-19,20-14-8-4-9-15-20)21-16-10-5-11-17-21;/h2-17H,1,18H2;1H/q+1;/p-1
3.InChIKey: FWYKRJUVEOBFGH-REWHXWOFAI

The toxicity data is as follows: