CETYL ALCOL

Alcohol cetylicus

 

Cetyl alcol la hon hp cac alcol ran, chu yeu cha hexadecanol (CH3-(CH2)14-CH2OH; p.t.l: 242,4).

Tnh chat

Khoi, bot, vay hay hat mau trang, nhn. Thc te khong tan trong nc, hi tan en de tan trong ethanol 96%, de tan trong ether. Khi un chay, hon hoa vi dau thc vat, m ong vat, parafin long va m cu nong chay.

nh tnh

A. Nhiet o nong chay

46 52 oC (Phu luc 6.7)

B. Ch so hydroxyl

218 -238 (Phu luc 7.4)

o trong va mau sac dung dch

Hoa tan 0,5 g che pham trong ethanol (TT) soi, e nguoi va pha loang en 20 ml vi cung dung moi. Dung dch thu c phai trong (Phu luc 9.2) va khong c am mau hn mau mau N6 (Phu luc 9.3, phng phap 2).

Ch so acid

Khong c qua 1,0 (Phu luc 7.2).

Ch so iod

Khong c qua 2,0 (Phu luc 7.5).

Dung 2,0 g che pham hoa tan trong 25 ml cloroform (TT).

Ch so xa phong hoa

Khong c qua 2,0 (Phu luc 7.7).

Dung 2,0 g che pham.

Cong dung

Ta dc.

Bao quan

Bao b kn, tranh anh sang.