Detail of "74-99-7"

Reference

Thermal decomposition of cigaret paper

Thermal decomposition of cigaret paper. VI. Low-boiling composition in pyrolysis products of cigaret paper composed of flax and wood pulps on addition of burning chemicals. Yamazaki, Akira; Maeda, Kazuo (Cent. Res. Inst., Japan Tabacco Inc., Japan). Kami Pa Gikyoshi, 40(10), 959-64 (Japanese) 1986. CODEN: KAGIAU. ISSN: 0022-815X. DOCUMENT TYPE: Journal CA Section: 43 (Cellulose, Lignin, Paper, and Other Wood Products) Section cross-reference(s): 11 Low-boiling compds. produced by pyrolysis of cigaret paper based on flax and wood pulp (mix ratio 9/1) in helium atm. at 650° were investigated by pyrolysis gas chromatog. anal. Fumarates, citrates, and phosphates were added to the cigaret paper as burning promoters (1, 3, and 5%). Low-boiling compds. in pyrolysis products of cigaret paper with the burning promoters were almost same as those of the paper without the additives. A distinct difference in yields of low-boiling products was obsd. at 3% addn. of burning promoters. The yields of 4 degrdn. compds. [propyne [74-99-7] + allene [463-49-0] (peak no. 8), acetaldehyde [75-07-0] (no. 12), and furan [110-00-9] (no. 20)] decreased.

Inhibition of nitrification in soil by acetylenic compounds

Inhibition of nitrification in soil by acetylenic compounds. McCarty, G. W.; Bremner, J. M. (Dep. Agron., Iowa State Univ., Ames, IA 50011, USA). Soil Sci. Soc. Am. J., 50(5), 1198-201 (English) 1986. CODEN: SSSJD4. ISSN: 0361-5995. DOCUMENT TYPE: Journal CA Section: 19 (Fertilizers, Soils, and Plant Nutrition) Section cross-reference(s): 5 Recent work has shown that acetylene [74-86-2] is a potent inhibitor of nitrification in soil. To discover if substituted acetylenes inhibit nitrification in soil, the effects of 17 monosubstituted (HC Y CR) acetylenes (propyne [74-99-7], 1-butyne [107-00-6], 2-ethynylpyridine [1945-84-2], phenylacetylene [536-74-3], 3-butyn-2-one [1423-60-5], 1-phenyl-2-propyn-1-ol [4187-87-5], pentyne [26856-36-0], 4-phenyl-1-butyne [16520-62-0], 5-phenyl-1-pentyne [1823-14-9], 1-ethynylcyclohexylamine [30389-18-5], 2-propyn-1-ol [107-19-7], 2-propyn-1-amine [2450-71-7], 1-hexyne [693-02-7], 3-butyn-1-ol [927-74-2], 1-heptyne [628-71-7], 1-octyne [629-05-0], acetylene monocarboxylic acid [471-25-0]) and of 7 disubstituted (RC Y CR1) acetylenes (2-butyne [503-17-3], 3-phenyl-2-propyn-1-ol [1504-58-1], diphenylacetylene [501-65-5], 2-butyn-1-ol [764-01-2], 2-butyn-1,4-diol [110-65-6], acetylene dicarboxylic acid [142-45-0], 2-butynoic acid [590-93-2]) were studied on prodn. of (NO3- + NO2-)-N in soils treated with (NH4)2SO4. Most of the substituted acetylenes tested inhibited nitrification in soil, and some were potent inhibitors of nitrification. The results with the 4 gaseous compds. tested showed that acetylene, propyne, and 1-butyne inhibited nitrification in soils at partial pressures as low as 0.1 or 1.0 Pa, whereas 2-butyne had little or no effect on nitrification at partial pressures as high as 10 Pa. The data obtained with the 21 nongaseous compds. tested showed that 2-ethynylpyridine, phenylacetylene, and 3-butyn-2-one had the greatest inhibitory effect on nitrification and that acetylene monocarboxylic acid, acetylene dicarboxylic acid, and 2-butynoic acid had the least effect. Studies to measure prodn. of C2H2 in soils treated with the nongaseous compds. showed that the inhibition of nitrification obsd. with these compds. was not due to C2H2 formed by their decompn. in soil. Expts. reported indicate that 2-ethynylpyridine and phenylacetylene compare favorably with nitrapyrin (N-Serve) and etridiazole (Dwell) as soil nitrification inhibitors and have potential practical value for retarding nitrification of fertilizer N in soil.