国内精品在线观看看_成本人妻片无码中文字幕免费_污网站日本永久免费_a√片免费大全在线观看不卡

鹽城三禾生物科技有限公司

Yancheng Sanhe Biochemical Co., Ltd.

PRODUCTS

Sanhe Biochemical

1,5-Dibromopentane

Product name 1,5-Dibromopentane
English alias Pentane, 1,5-dibromo-; Pentamethylene bromide;
Structural formula
Molecular formula C5H10Br2
Molecular weight 229.94100
Appearance Clear liquid
Melting point −34 ℃(lit.)
Relative density 1.688 g/mL at 25 ℃(lit.)
Boiling point 110 ℃15 mm Hg(lit.)
Water solubility Practically Insoluble
Refractivity n20/D 1.512(lit.)
Content ≥99.0%
Moisture ≤0.05%
Stability Stable at room temperature in closed containers under normal storage and handling conditions.
Flash point >230 °F
Vapor pressure 0.136mmHg at 25℃
Storage Under storeroom ventilated at low temperature and stored separately with oxidizing agent
Use organic synthesis intermediates.
Production method In 500ml flask, 250g 48% hydrobromic acid was added in turn. 75g concentrated sulfuric acid; 21.5 g tetrahydropyrrolidene (86.5-87.5 ℃ distillate) was installed with a reflux condenser. The brown mixture was heated and refluxed gently for 3 h. After cooling to room temperature, dibromide was separated from the lower layer. The product was washed once with saturated sodium carbonate solution and water, dried with anhydrous calcium chloride, distilled by vacuum distillation, collected at 104-106 ℃ and 2.53kpa. the yield was 46-47g. The yield is 80-82.
UN No. UN1707 PG II
Hazard class 6.1
HS code 2903309090
Packing 250KGS/Closed steel drum
CAS # 111-24-0

[ BACK ]

SANHE BIOCHEMICAL

HOME  |   ABOUT US  |   PRODUCTS  |   NEWS  |   FACTORY  |   HONORS  |   CONTACT  |   中文版

Copyright(C)2024, Yancheng Sanhe Biochemical Co., Ltd. All Rights Reserved. Supported by Sunsirs ChemNet Toocle Copyright Notice 備案序號(hào):蘇ICP備18016072號(hào)