cas号的解释是什么

CAS号(Chemical Abstracts Service)是美国化学文摘登记号，该号是用来判定检索有多个名称的化学物质信息的重要工具。

What is CAS?

A. CAS (Chemical Abstracts Service) is a division of the American Chemical Society. We are located in Columbus, Ohio. CAS is the producer of the largest and most comprehensive databases of chemical information. Our principal databases are Chemical Abstracts (CA) which contains over 23 million document records from the chemical journal and patent literature, and Registry which contains over 24 million substance and 50 million sequence records

CAS also operates the STN International online service with partner organizations in Europe and Asia. STN provides access to nearly 200 databases covering topics such as science, technology, patents, and business information.

该物质的名称是beta-aspartylaspartic acid

我也不是很清楚，cas号和有没有毒没关系吧。我的理解就是，可以用号查到对应的化学品

附，百度到的查询网址

查到了化学品，就可以再查资料确定是那种危险品了

完毕，望采纳，谢谢

CAS registry numbers are unique numerical identifiers for chemical compounds, polymers, biological sequences, mixtures and alloys. They are also referred to as CAS numbers or CAS RNs.

Chemical Abstracts Service (CAS), a division of the American Chemical Society, assigns these identifiers to every chemical that has been described in the literature. The intention is to make database searches more convenient, as chemicals often have many names. Almost all molecule databases today allow searching by CAS number.

As of Nov 2, 2005, there were 26,901,696 substances in the CAS registry — the current number is published here. About 4,000 new numbers are added each day.

CAS registry number is separated by hyphens into three parts, the first consisting of up to 6 digits, the second consisting of two digits, and the third consisting of a single digit serving as a check digit.

2。 UN no. 才是危险品特有的。 运输都要有这号码。

UN numbers or UN IDs are four-digit numbers that identify dangerous goods hazardous substances and articles (such as explosives, flammable liquids, toxic substances, etc.) in the framework of international transport. Some hazardous substances have their own UN numbers (e.g. acrylamide has UN2074), while sometimes groups of chemicals or products with similar properties receive a common UN number (e.g. flammable liquid, not otherwise specified, have UN1993). A chemical in its solid state may receive a different UN number than the liquid phase if their hazardous properties differ significantlysubstances with different levels of purity may also receive different UN numbers.

UN numbers range from UN0001 to about UN3500 and are assigned by the United Nations Committee of Experts on the Transport of Dangerous Goods. They are published as part of their Recommendations on the Transport of Dangerous Goods, also known as the Orange Book. These recommendations are adopted by the regulatory organization responsible for the different modes of transport.

NA numbers (North America), also known as DOT numbers are issued by the United States Department of Transportation and are identical to UN numbers, except that some substances without a UN number may have an NA number. These additional NA numbers use the range NA8000 - NA9999.

Associated with each UN number is a hazard identifier, which encodes the general hazard class and subdivision (and, in the case of explosives, their compatibility group). For instance, the hazard identifier of acrylamide is 6.1 and the one of cigarette lighters is 2.1. If a substances poses several dangers, then subsidiary risk identifiers may be specified. It is not possible to deduce the hazard class(es) of a substance from its UN number: they have to be looked up in a table.

The hazard classes and their divisions are:

Class 1: Explosives

Division 1.1: Substances and articles which have a mass explosion hazard

Division 1.2: Substances and articles which have a projection hazard but not a mass explosion hazard

Division 1.3: Substances and articles which have a fire hazard and either a minor blast hazard or a minor projection hazard or both, but not a mass explosion hazard

Division 1.4: Substances and articles which present no significant hazard

Division 1.5: Very insensitive substances which have a mass explosion hazard

Division 1.6: Extremely insensitive articles which do not have a mass explosion hazard

Class 2: Gases

Division 2.1: Flammable gases

Division 2.2: Non-flammable, non-toxic gases

Division 2.3: Toxic gases

Class 3: Flammable liquids

Class 4: Flammable solidssubstances liable to spontaneous combustionsubstances which, on contact with water, emit flammable gases

Division 4.1: Flammable solids, self-reactive substances and solid desensitised explosives

Division 4.2: Substances liable to spontaneous combustion

Division 4.3: Substances which in contact with water emit flammable gases

Class 5: Oxidizing substances and organic peroxides

Division 5.1: Oxidizing substances

Division 5.2: Organic peroxides

Class 6: Toxic and infectious substances

Division 6.1: Toxic substances

Division 6.2: Infectious substances

Class 7: Radioactive material

Class 8: Corrosive substances

Class 9: Miscellaneous dangerous substances and articles

中文名称

1,1,1,3,5,7,7,7-八甲基四硅氧烷

中文别名

3H,5H-八甲基四硅氧烷

英文名称

1,1,1,3,5,7,7,7-Octamethyltetrasiloxane

英文别名

1,3-BIS(TRIMETHYLSILOXY)-1,3-DIMETHYLDISILOXANE1,1,1,3,5,7,7,7-OctaMethyltetrasiloxane

CAS号

16066-09-4

上游原料

CAS号

中文名称

75-54-7

甲基二氯硅烷

107-46-0

六甲基二硅氧烷

75-77-4

三甲基氯硅烷

110-54-3

正己烷

下游产品

CAS号

名称

16066-09-4

1,1,1,3,5,7,7,7-八甲基四硅氧烷

更多上下游产品参见：http://baike.molbase.cn/cidian/34515

中文别名： 2,4-二氨基甲苯2.4-甲苯二胺

英文名称： 2,4-Diaminotoluene

英文别名： 2,4-Toluenediamine4-Methyl-1,3-phenylenediamine2,4-ToluilenediamineToluene-2,4-diamine4-Methyl-m-phenylenediamineC.I.76035C.I.Oxidation base

CAS号： 95-80-7

EINECS号： 202-453-1

分子式： C7H10N2

分子量： 122.16

中文别名： 2-甲基-1,3-苯二胺2.6-甲苯二胺

英文名称： 2,6-Diaminotoluene

英文别名： Diaminotoluene,98%2-Methyl-1,3-phenylenediamine2,6-Toluenediamine2-methyl-m-phenylenediamine

CAS号： 823-40-5

EINECS号： 212-513-9

分子式： C7H10N2

分子量： 122.17

InChI： InChI=1/C7H10N2/c1-5-6(8)3-2-4-7(5)9/h2-4H,8-9H2,1H3

熔点： 102-107℃

沸点： 289℃

水溶性： 60 g/L (15℃)

风险术语： R21/22:R40:R43:R50/53:

安全术语： S24:S36/37:S61:

InChI： InChI=1/C7H10N2/c1-5-2-3-6(8)4-7(5)9/h2-4H,8-9H2,1H3

分子结构：

密度： 283

熔点： 97-101℃

沸点： 283-285℃

闪点： 149℃

水溶性： 50 g/l (25℃)

风险术语： R21:R25:R36:R43:R45:R51/53:

安全术语： S45:S53:S61:

用途

MSDS

用途与合成方法

五甲基环戊二烯 价格(试剂级)

供应商

供应信息

相关产品

网站主页 化工产品目录 有机原料 烃类化合物及其衍生物 环烃 五甲基环戊二烯

五甲基环戊二烯

五甲基环戊二烯

中文名称:五甲基环戊二烯

英文名称:1,2,3,4,5-Pentamethylcyclopentadiene

CAS号:4045-44-7

分子式:C10H16

分子量:136.23

EINECS号:223-743-4

Mol文件:4045-44-7.mol

五甲基环戊二烯

五甲基环戊二烯 性质

沸点 58 °C13 mm Hg(lit.)

密度 0.87 g/mL at 25 °C(lit.)

折射率 n20/D 1.474(lit.)

闪点 112 °F

储存条件 Store below +30°C.

形态Liquid

比重0.87

颜色Clear colorless to yellow-orange, may darken on storage

水溶解性 Miscible with methanol. dichloromethane and ethyl acetate. Slightly miscible with water.

敏感性 Light Sensitive

BRN 1849832

稳定性store cold

CAS 数据库4045-44-7(CAS DataBase Reference)

NIST化学物质信息1,3-Cyclopentadiene, 1,2,3,4,5-pentamethyl-(4045-44-7)

五甲基环戊二烯 用途与合成方法

用途五甲基环戊二烯是一种有用的研究化学品。

用途 功能材料中间体

安全信息

危险类别码 10

安全说明 16

危险品运输编号 UN 3295 3/PG 3

WGK Germany 3

F 9-23

危险等级3

包装类别III

海关编码 29021990

MSDS信息

语言：English提供商：1,2,3,4,5-Pentamethyl-1,3-cyclopentadiene

语言：English提供商：SigmaAldrich

语言：English提供商：ACROS

语言：Chinese提供商：ALFA

语言：English提供商：ALFA

五甲基环戊二烯 价格(试剂级)

更新日期2022-11-07

产品编号L10957

产品名称1,2,3,4,5-五甲基环戊二烯, 94%

CAS编号4045-44-7

包装1g

价格734

更新日期2022-11-07

产品编号L10957

产品名称1,2,3,4,5-五甲基环戊二烯, 94%

CAS编号4045-44-7

包装5g

价格2853

五甲基环戊二烯供应商更多

公司名称：海门德思行药业科技有限公司 黄金产品

联系电话：0513-68050135 13813769692

产品介绍： 中文名称：五甲基环戊二烯

英文名称：1,2,3,4,5-Pentamethylcyclopentadiene

CAS：4045-44-7

纯度：0.98 包装信息：10g 1kg 10kg 备注：0

公司名称：武汉峰耀同辉化学制品有限公司 黄金产品

联系电话：027-027-87466205 15377573527

产品介绍： 中文名称：1,2,3,4,5-五甲基环戊二烯五甲基环戊二烯五甲基环五二烯

英文名称：1,2,3,4,5-Pentamethylcyclopentadiene

CAS：4045-44-7

纯度：98% 包装信息：1kg 备注：原料药、医药中间体、精细化学品

公司名称：常州迈诺进出口有限公司 黄金产品

联系电话：0519-85010339 13584504415

产品介绍： 中文名称：五甲基环戊二烯

英文名称：1,2,3,4,5-Pentamethylcyclopentadiene

CAS：4045-44-7

纯度：98% 包装信息：5KG1KG

公司名称：安庆融创生物科技有限公司 黄金产品

联系电话： 15001988657

产品介绍： CAS：4045-44-7

包装信息：10g/100g/1kg/10kg/

公司名称：天津中信凯泰化工有限公司

联系电话：022-66880623

产品介绍： 英文名称：MCPT

CAS：4045-44-7

纯度：93-97% 包装信息：180kg druM 备注：In organic synthesis, high-energy rocket fuel, plasticizer, surface coating, curing agent, polyMer synthetic Materials

五甲基环戊二烯生产厂家及价格列表

2022-12-15 五甲基环戊二烯 河南阿尔法化工有限公司

2022-12-12 五甲基环戊二烯 河南威梯希化工科技有限公司

"五甲基环戊二烯"相关产品信息

二(五甲基环戊二烯基)二氯化铪(IV),98+% 五甲基环戊二烯基三氯化钛(IV) 双(五甲基环戊烯)二氯化钛 双(五甲基环戊二烯基)铁 三甲氧基(五甲基环戊二烯)钛 羧甲基纤维素钠 2-氯-5-氯甲基吡啶 脱氧麻黄碱 N,N-二甲基甲酰胺 四甲基(正丙基)环戊二烯 五甲基环五二烯化钠 5-溴-1,2,3,4,5-五苯基-1,3-环戊二烯 戊苯基-环戊二烯 十甲基环五硅氧烷 甲基环戊二烯二聚体 五甲基环戊二烯 环戊二烯 四苯基环戊二烯酮

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中文名称

N-芴甲氧羰基-N’-硝基-L-精氨酸

中文别名

FMOC-硝基-精氨酸NAlpha-FMOC-Nω-硝基-L-精氨酸N-芴甲氧羰基-N'-硝基-L-精氨酸FMOC-硝基-L-精氨酸Nα-FMOC-Nω-硝基-L-精氨酸Nα-Fmoc-Nω-硝基-L-精氨酸

英文名称

Fmoc-Arg(NO2)-OH

英文别名

(2S)-5-[[amino(nitramido)methylidene]amino]-2-(9H-fluoren-9-ylmethoxycarbonylamino)pentanoic

acid

外观性状

白色-灰白色粉末

折射率

1.673

熔点

103

to

110ºC

密度

1.47g/cm3

结构式：