paraformaldehyde
par·a·for·mal·de·hyde
P0058300 (păr′ə-fôr-măl′də-hīd′)paraformaldehyde
(ˌpærəfɔːˈmældɪˌhaɪd) orparaform
par•a•form•al•de•hyde
(ˌpær ə fɔrˈmæl dəˌhaɪd, -fər-)n.
单词 | paraformaldehyde |
释义 | paraformaldehydepar·a·for·mal·de·hydeP0058300 (păr′ə-fôr-măl′də-hīd′)paraformaldehyde(ˌpærəfɔːˈmældɪˌhaɪd) orparaformpar•a•form•al•de•hyde(ˌpær ə fɔrˈmæl dəˌhaɪd, -fər-)n. paraformaldehydeparaformaldehyde:see formaldehydeformaldehyde, HCHO, the simplest aldehyde. It melts at −92°C;, boils at −21°C;, and is soluble in water, alcohol, and ether; at STP, it is a flammable, poisonous, colorless gas with a suffocating odor. ..... Click the link for more information. . Paraformaldehyde(also paraform), a mixture of formaldehyde polymerization products, called polyoxymethylenes, of the general formula (—CH2O—)n where n is any integer from eight to 100. Paraformaldehyde is a white, crystalline substance with a melting range between 105° and 150°C. It is obtained by evaporating concentrated, aqueous solutions of formaldehyde in vacuo. Paraformaldehyde is a convenient source of formaldehyde. paraformaldehyde[¦par·ə·fȯr′mal·də‚hīd]paraformaldehydepar·a·for·mal·de·hyde(par'ă-fōr-mal'dĕ-hīd),paraformaldehyde(păr″ă-for-măl′dĕ-hīd)par·a·for·mal·de·hyde(par'ă-fōr-mal'dĕ-hīd)See PFA |
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