??????? ??????? C??? ??, ??, ??

??? ??

white to off-white powder

Safety Profile

Moderately toxic by ingestion.Slightly toxic by intraperitoneal route. When heated todecomposition it emits acrid smoke and irritating vapors

Purification Methods

Crystallise pentaerythritol tetraacetate from hot water, then leach it with cold water until the odour of acetic acid is no longer detectable. It also crystallises from 95% EtOH after dissolving in CHCl3, washing with saturated NaHCO3, then H2O, drying over anhydrous CaCl2 and evaporating. It has been prepared by acetolysis of the tetranitrate in 95% yield [Wolfrom et al. J Am Chem Soc 73 874 1951]. [Breusch & Oguzer Chem Ber 88 1511 1955, LeFèvre et.al. J Chem Soc 16 1958, Beilstein 1 IV 1812, 2 IV 264.]

??????? ??????? ?? ?? ? ???

???

?? ??

??????? ??????? ?? ??

???	??	???	??	?? ?	??
Hebei Chuanghai Biotechnology Co., Ltd	+86-15531157085 +86-15531157085	abby@chuanghaibio.com	China	8805	58
Hebei Mujin Biotechnology Co.,Ltd	+86 13288715578 +8613288715578	sales@hbmojin.com	China	12825	58
Hebei Zhuanglai Chemical Trading Co Ltd	+86-16264648883 +86-16264648883	niki@zlchemi.com	China	3712	58
CONIER CHEM AND PHARMA LIMITED	+8618523575427	sales@conier.com	China	49732	58
career henan chemical co	+86-0371-86658258 +8613203830695	factory@coreychem.com	China	29809	58
Hefei TNJ Chemical Industry Co.,Ltd.	+86-0551-65418671 +8618949823763	sales@tnjchem.com	China	34563	58
Shanghai UCHEM Inc.	+862156762820 +86-13564624040	sales@myuchem.com	China	7649	58
Alfa Chemistry		info@alfa-chemistry.com	United States	2344	58
Dayang Chem (Hangzhou) Co.,Ltd.	571-88938639 +8617705817739	info@dycnchem.com	China	52849	58
Alfa Chemistry		Info@alfa-chemistry.com	United States	24072	58

??????? ??????? ?? ??: