一二三四区视频,亚洲少妇熟女色,日本久热无码视频网,欧美国产日韩大尺度,亚洲a视频,久久少妇一区二区,日韩999无码视频,刺激久久久久久久,啊啊啊啊不要啊在线

??????

??????
?????? ??? ???
?? ??:
103-64-0
???:
??????
???(??):
(2-??????)??;??????;??-???????
???:
beta-Bromostyrene
???(??):
β-Bromostyrene;[(E)-2-Bromoethenyl]benzene;1-BROMO-2-PHENYLETHYLENE;(Z)-β-bromostyrene;BROMSTYROL;BROMOSTYROL;Bromstyrole;B-BROMSTYROL;hyacinthbase;styrylbromide
CBNumber:
CB5119040
???:
C8H7Br
??? ??:
183.05
MOL ??:
103-64-0.mol
MSDS ??:
SDS

?????? ??

???
7 °C(lit.)
?? ?
219-221 °C(lit.)
??
1.427 g/mL at 25 °C(lit.)
???
16.4Pa at 25℃
???
n20/D 1.608
???
215 °F
?? ??
2-8°C
???
???? ?????.
??? ??
??
??
?? ?? ???
??
????? ??? ? 1.00%. ?? ?? ?? ?? ????
?? ??
??
???
56.624mg/L at 25℃
BRN
2038495
Henry's Law Constant
1.8×10-2 mol/(m3Pa) at 25℃, HSDB (2015)
InChI
1S/C8H7Br/c9-7-6-8-4-2-1-3-5-8/h1-7H/b7-6+
InChIKey
YMOONIIMQBGTDU-VOTSOKGWSA-N
SMILES
Br\C=C\c1ccccc1
LogP
3.391 at 25℃
CAS ??????
103-64-0(CAS DataBase Reference)
NIST
Benzene, (2-bromoethenyl)-(103-64-0)
EPA
.beta.-Bromostyrene (103-64-0)
??
  • ?? ? ?? ??
  • ?? ? ???? ?? (GHS)
??? ?? Xn
?? ???? ?? 22
????? 23-24/25-36/37
WGK ?? 3
RTECS ?? WL3850000
TSCA TSCA listed
HS ?? 29039990
???? ??? 10 - Combustible liquids
Hazard Classifications Acute Tox. 4 Oral
?? ?? ??? 103-64-0(Hazardous Substances Data)
?? An acute oral LD50 in rats was reported as 1.25 ml/kg(0.82-189 ml/kg). The acute dermal LD50 was reported as > 6 ml/kg in the rabbit
???? ?? KE-03670
????(GHS): Exclamation Mark (GHS07)
?? ?: Warning
??·?? ??:
?? ??·?? ?? ?? ?? ?? ?? ? ?? ?? P- ??
H227 ??? ?? ??? ?? ?? 4 ?? P210, P280, P370+P378, P403+P235,P501
H302 ??? ??? ?? ?? ?? - ?? ?? 4 ?? P264, P270, P301+P312, P330, P501
??????:
P264 ?? ??? ?? ??? ????.
P264 ?? ??? ?? ??? ????.
P270 ? ??? ??? ??? ???, ???? ???? ???.
P403+P235 ??? ? ?? ?? ???? ???? ?????.
P501 ...? ??? / ??? ?? ???.
NFPA 704
2
2 0

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

??? ??

CLEAR YELLOWISH TO BROWN LIQUID

??

Apparently has not been reported to occur in nature.

??

Beta-Bromostyrene, cis + trans is an important raw material and intermediate used in organic Synthesis, pharmaceuticals, agrochemicals and dyestuff.

?? ??

By the action of aqueous alkali on cinnamic acid dibromide.

?? ??

β-Bromostyrene is an α,β-unsaturated aromatic halide. It can be synthesized by catalytic Hunsdiecker reaction (CHR) of cinnamic acid. It is commonly utilized as a precursor for preparing substituted alkenes, corresponding acetylenes and also in the total synthesis of natural compounds and antibiotics.

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

???

?? ??


?????? ?? ??

???( 255)?? ??
??? ?? ??? ?? ?? ? ??
Henan Fengda Chemical Co., Ltd
+86-371-86557731 +86-13613820652
info@fdachem.com China 20122 58
Hebei Zhuanglai Chemical Trading Co Ltd
+86-16264648883
niki@zlchemi.com China 7245 58
Henan Tianfu Chemical Co.,Ltd.
+86-0371-55170693 +86-19937530512
info@tianfuchem.com China 21586 55
career henan chemical co
+86-0371-86658258 +8613203830695
sales@coreychem.com China 29815 58
Alchem Pharmtech,Inc.
8485655694
sales@alchempharmtech.com United States 63687 58
Shaanxi Dideu Medichem Co. Ltd
+8617392709771
1097@dideu.com China 3992 58
Hefei TNJ Chemical Industry Co.,Ltd.
+86-0551-65418671 +8618949823763
sales@tnjchem.com China 34563 58
ANHUI WITOP BIOTECH CO., LTD
+8615255079626
eric@witopchemical.com China 23541 58
Dayang Chem (Hangzhou) Co.,Ltd.
+86-0571-88938639 +8617705817739
info@dycnchem.com China 52704 58
Zhuoer Chemical Co., Ltd
02120970332; +8613524231522
sales@zhuoerchem.com China 2904 58

?????? ?? ??:

Copyright 2019 ? ChemicalBook. All rights reserved
庆阳市| 承德市| 祁东县| 吴桥县| 二连浩特市| 菏泽市| 台安县| 沁阳市| 张家口市| 德江县| 崇礼县| 炉霍县| 颍上县| 台北市| 福安市| 公安县| 华蓥市| 大埔县| 海宁市| 巴林右旗| 雷州市| 淄博市| 垫江县| 武功县| 双牌县| 荥阳市| 桑植县| 杭州市| 深州市| 石景山区| 陵水| 密云县| 平南县| 河东区| 章丘市| 麟游县| 惠安县| 墨竹工卡县| 通渭县| 吉水县| 岳阳市|