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Detail of "2638-94-0"

  • CAS Number:
  • 2638-94-0
  • Name:

  • 4,4'-Azobis(4-cyanopentanoic acid)

  • Superlist Name:
  • 4,4'-Azobis(4-cyanovaleric acid)
  • Molecular Structure:
  • Formula:
  • C12H16N4O4
  • Molecular Weight:
  • 280.28
  • Deleted CAS:
  • 30248-30-7
  • Synonyms:
  • Pentanoicacid, 4,4'-azobis[4-cyano- (9CI);Valeric acid, 4,4'-azobis[4-cyano- (6CI,8CI);4,4'-Azobis(4-cyanopentanecarboxylic acid);4,4'-Azobis(cyanovaleric acid);4,4'-Azobis[4-cyanopentanoic acid];4,4'-Azobis[4-cyanovaleric acid];ABCVA;ACV-A;Azobis(cyanovaleric acid);NSC 114466;V 501;VA 501;Vazo 68;Vazo68WSP;
  • EINECS:
  • 220-135-0
  • Density:
  • 1.23 g/cm3
  • Melting Point:
  • 118-125 °C (dec.)(lit.)
  • Boiling Point:
  • 503.6 °C at 760 mmHg
  • Flash Point:
  • 258.3 °C
  • Appearance:
  • white crystalline powder
  • Hazard Symbols:
  • FlammableF
  • Risk Codes:
  • 11
  • Safety:
  • 15-16-22-24/25-36 Details
  • Transport Information:
  • UN 1325 4.1/PG 2
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CAS No.2638-94-0 4,4'-Azobis(4-cyanovaleric acid)

Assay:99% min(afte...  Appearance:White crysta...  Package:20kg Carton

4,4’-Azobis(4-Cyano Valeric Acid) [2638-94-0] Specification and properties: Melting point 110-1200C Loss on drying 10-18% max(water) Iron 10ppm max Heavy metal 10ppm max Chemical term: 4,4’-Azobis(4-Cyano Valeric Acid) Formula: C12H16N4O4 M.W.: 2

Supplier:Zouping Mingxing Chemical Co.,Ltd. [ China (Mainland)]

Platinum
SupplierManufacturer 2185Integral
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Tel:86-543-4350217

Address:428 Daixi Third Road Zouping County Shandong Province China

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CAS No.2638-94-0 4,4'-Azobis(4-cyanovaleric acid)

Assay:98℅  Appearance:Inqury  Package:100g,500g,12...

Supplier:Shanghai DEMO Medical Tech Co.,Ltd [ China (Mainland)]

Platinum
Supplier 1269Integral
1269

Tel:+86-021-50182336

Address:Room 1305,Building 1,No.Jinyu Road,Pudong New District

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CAS No.2638-94-0 4,4'-Azobis(4-cyanovaleric acid)

Assay:99.5%  Appearance:Powder  Package:25kg/drum

Supplier:Henan Tianfu Chemical Co., Ltd. [ China (Mainland)]

Platinum
Supplier 375Integral
375

Tel:86-371-87093236

Address:Zhengzhou International Trade New Territory,Jinshui District,Zhengzhou ,China

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CAS No.2638-94-0 4,4'-Azobis(4-cyanovaleric acid)

Assay:98%

Supplier:Hangzhou Dayangchem Co., Ltd. [ China (Mainland)]

Platinum
SupplierISO 3875Integral
3875

Tel:+86-571-88938639

Address:B/2601 Fuli Building, 328# WenEr Rd. Hangzhou City 310012 China

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CAS No.2638-94-0 4,4'-Azobis(4-cyanovaleric acid)

Supplier:HuiDe Tech Industrial Co., Ltd. [ China (Mainland)]

Platinum
Supplier 360Integral
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Tel:18633809316

Address:Unit 04,7/F,bright way tower No.33 mong kok road ,kowloon,HK.

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CAS No.2638-94-0 4,4'-Azobis(4-cyanovaleric acid)

Product name:4,4-Azobis(4-cyano valeric acid) CAS NO.:2638-94-0 Assay:98% min, Appearance: white powder, Loss on Drying: 20% max, Ash content: 1% max Appearance:white crystalline powder used for Trigger agents, blowing agents

Supplier:Langfang hawk technology&development Co., Ltd（Langfang Triple Well） [ China (Mainland)]

411Integral
411

Tel:+86-316-2224727 2224728 2224729

Address:Tsinghua science park,Langfang Economic & Development Zone,Hebei Province, China

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CAS No.2638-94-0 4,4'-Azobis(4-cyanovaleric acid)

Assay:98% min  Appearance:white crysta...  Package:20kg/paperbo...

1.Name: 4,4'-Azobis(4-cyanovaleric acid) (Other name:ACVA) 2.MF: C12H16N4O4 3.Uses :mainly used as polymerization initiator for polyvinyl chloride, polyacrylonitrile, polyvinyl alcohol and synthetic fibers, and as a blowing agent for plastics and elastomers.

Supplier:Shenyang Jiutongyuan Chemicals Co., Ltd. [ China (Mainland)]

1525Integral
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Tel:+86-024-62640739

Address:No.3 South Changjiang Street Huanggu District Shenyang City Liaoning Province China

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CAS No.2638-94-0 4,4'-Azobis(4-cyanovaleric acid)

4,4’-Azobis(4-Cyano Valeric Acid) 4.4’

Supplier:Hengshui yowey fine chemical Co., Ltd.(hengshui haoye I&E chemical Co.,Ltd) [ China (Mainland)]

600Integral
600

Tel:+86-318-2102300

Address:Heping west road

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CAS No.2638-94-0 4,4'-Azobis(4-cyanovaleric acid)

4,4’-Azobis(4-Cyano Valeric Acid)

Supplier:Roatak (HK) Enterprise CO., Limited [ China (Mainland)]

610Integral
610

Tel:86-10-57191470

Address:Room 1007 306#, Shaoyaoju North Block, Chaoyang District, Beijing 100029, China

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CAS No.2638-94-0 4,4'-Azobis(4-cyanovaleric acid)

Supplier:ATL TECH CHEMICALS LTD [ United States]

600Integral
600

Tel:404-521-2739

Address:77 Crystal Palace road, Atlanta, GA .30303 , Texas, United States

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CAS No.2638-94-0 4,4'-Azobis(4-cyanovaleric acid)

Supplier:Pfaltz & Bauer, Inc. [ United States]

600Integral
600

Tel:2035740075

Address:172 East Aurora St.

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CAS No.2638-94-0 4,4'-Azobis(4-cyanovaleric acid)

Supplier:ADVANCED TECH. & IND. CO., LTD. [ Hong Kong]

610Integral
610

Tel:86-23902293

Address:UNIT B, 1/F, CHEONG SHING IND. BLDG., 17 WALNUT ST., TAI KOK TSUI, KLN, HONG KONG

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CAS No.2638-94-0 4,4'-Azobis(4-cyanovaleric acid)

Supplier:Zibo Chunwangda Chemical Co.,Ltd. [ China (Mainland)]

63Integral
63

Tel:+86 533-7523860

Address:South section of Yixi Rd., Qilu chemical industrial park, Shandong, China

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Reference

Polymerization of diene hydrocarbons in the presence of azonitrile initiators containing carboxyl and hydroxyl groups
Polymerization of diene hydrocarbons in the presence of azonitrile initiators containing carboxyl and hydroxyl groups. Kartavykh, V. P.; Drach, V. A.; Barantsevich, E. N.; Abramenko, E. L. (Vses. Nauchno-Issled. Inst. Sint. Kauch. im. Lebedeva, Leningrad, USSR). Vysokomol. Soedin., Ser. A, 19(6), 1226-9 (Russian) 1977. CODEN: VYSAAF. DOCUMENT TYPE: Journal CA Section: 38 (Elastomers, Including Natural Rubber) The radical polymn. of butadiene (I) [106-99-0] and isoprene (II) [78-79-5] at 70.degree. in the presence of 4,4'-azobis(4-cyanovaleric acid) (II) [2638-94-0] or 4,4'-azobis(4-cyanopentanol) (IV) [4693-47-4] is a half-order reaction with respect to the monomer and a half-order reaction with respect to the catalyst. The ratio kp2/kt (where kp and kt are the propagation rate and termination rate consts., resp.) for I and II is 3.33 .times. 10-3 and 3.56 .times. 10-3 L/mols, resp. The decompn. rate consts. of the catalysts (kd), as detd. by the iteration method, are kd0 = 4.58 .times. 10-5 and kd1 = 4.26 .times. 10-5 for III and IV, resp.
On the kinetics of the polymerization of some ammonium methacrylates with different alkyl chain lengths in aqueous solution
On the kinetics of the polymerization of some ammonium methacrylates with different alkyl chain lengths in aqueous solution. Ringsdorf, Helmut; Thunig, Dieter (Inst. Org. Chem., Univ. Mainz, Mainz, Ger.). Makromol. Chem., 178(8), 2205-10 (English) 1977. CODEN: MACEAK. DOCUMENT TYPE: Journal CA Section: 35 (Synthetic High Polymers) Section cross-reference(s): 23 Methacryloyloxyalkyltrimethylammonium chlorides with different alkyl chain lengths were synthesized and polymd. radically with 4,4'-azobis(4-cyanovaleric acid) [2638-94-0] or K2S2O8 as initiators; with K2S2O8, reaction orders of 0.5 and 1 with respect to initiator and monomer, resp., were obsd. For the ionic monomers with longer alkyl chains the ratio of rate consts. kp(2fkd/kt)0.5 (where kp = rate const. of polymn.; f = efficiency factor; kd = rate const. of dissocn.; and kt = rate const. of termination) was detd. over a wide concn. 2638-94-0 which is the cas registry number of some chemical is mentioned. range. The ratio of rate consts. increases with decreasing monomer concn. because of a diminished termination rate due to an increased electrostatic repulsion of the ionic polymer radicals in dil. soln. (increase of dissocn.). Methacryloyloxyethyltrimethylammonium chloride [5039-78-1] does not show this effect because of the diminished effective charge of the ammonium group in the preferred gauche conformation of the mol. .
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