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多聚甲醛

产品号 A11313 公司名称 Alfa Aesar
CAS号 30525-89-4 公司网站 http://www.alfa.com
分子式 CH2O 电 话
分子量 30.02598 传 真
纯 度 97% 电子邮件
保 存 Chembase数据库ID: 3484

产品价格信息

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产品别名

标题
Paraformaldehyde
IUPAC标准名
formaldehyde
IUPAC传统名
formaldehyde
别名
Polyoxymethylene

产品登记号

CAS号 30525-89-4
MDL号 MFCD00133991
默克索引号 147025
EC号 200-001-8
Beilstein号 102769

产品性质

纯度 97%
密度 1.30
闪点 71°C(159°F)
熔点 120-170°C dec.
GHS危险品标识 GHS02
GHS危险品标识 GHS05
GHS危险品标识 GHS07
GHS危险品标识 GHS08
GHS危险声明 H314-H318-H228-H351-H302-H332-H317
欧盟危险性物质标志 X
欧盟危险性物质标志 腐蚀性(Corrosive) 腐蚀性(Corrosive) (C)
欧盟危险性物质标志 易燃性(Flammable) 易燃性(Flammable) (F)
GHS警示性声明 P210-P241-P303+P361+P353-P305+P351+P338-P405-P501A
危险公开号 11-20/22-34-40-43
RTECS编号 RV0540000
安全公开号 9-20-26-36/37/39-45-60
TSCA收录
联合国危险货物等级 4.1
联合国危险货物编号 UN2213
联合国危险货物包装类别(PG) III

产品详细信息

参考文献

  • Formaldehyde monomer, generated by thermolysis, has been used for the ɑ-hydroxymethylation of dilithiated carboxylic acids. Dehydration of the products affords ɑ-alkyl acrylic acids: J. Org. Chem., 37, 1256 (1972). Monomeric formaldehyde can also be prepared as a THF solution by dehydration with p-Toluenesulfonic anhydride, L00160, and co-distillation of the monomer with the solvent: Synlett, 704 (1990). The use of anhydrous molecular formaldehyde for hydroxymethylation reactions has been discussed: Synlett, 227 (1990).
  • For use in the preparation of di-t-butyl methylenemalonate, see Di-tert-butyl malonate, A12774. For the direct ɑ-methylenation of ketones, see N-Methylanilinium trifluoroacetate, A17781.
  • For use in preparation of Mannich bases, see: Org. Synth. Coll., 3, 305 (1955); 4, 281 (1963). For reviews, see: Org. React., 1, 303 (1942); Synthesis, 703 (1973); Tetrahedron, 46, 1791 (1990).
  • In the presence of HCl, aromatics undergo chloromethylation. For reviews, see: Org. React., 1, 63 (1942); Russ. Chem. Rev., 46, 891 (1977). Caution! carcinogenic bis(chloromethyl) ether is formed in these reactions. In combination with Hydrobromic acid, A14475, the bromomethylation of aromatics has been effected: J. Org. Chem., 58, 1262 (1993). The same combination also N-bromomethylates phthalimide and other imides: Synlett, 933 (1994).
  • Reaction with dialkyl phosphites gives hydroxymethyl phosphonates, which, after O-protection, undergo the Horner-Wadsworth-Emmons reaction to give enol ethers. See, e.g.: Org. Synth. Coll., 7, 160 (1990).
  • See also Formaldehyde, A16163 and 1,3,5-Trioxane, A15639 .