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| CAS号 : | 75-75-2 |
精确质量 : | 95.98810 |
| 分子式 : | CH4O3S |
logP : | 0.58480 |
| 分子量 : | 96.10570 |
PSA : | 62.75000 |
甲烷磺酸 | |
methanesulfonic acid | |
75-75-2 | |
CH4O3S | |
96.10570 | |
62.75000 | |
0.58480 | |
95.98810 |
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n20/D 1.429(lit.)
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3.3 (vs air)
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无色至淡黄色液体
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库房通风低温干燥,与氧化剂、碱类分开存放
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>230 °F
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167 °C10 mm Hg(lit.)
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19 °C
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1.481 g/mL at 25 °C(lit.)
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Stable. Moisture sensitive. Incompatible with amines, bases, water, common metals. Releases a substantial amount of heat when diluted with water (add acid to water with care if diluting).
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1 mm Hg ( 20 °C)
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GHS05, GHS07 | |
危险 | |
H290; H302 + H312; H314; H335 | |
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PB1140000
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8
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1
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S26-S36-S45-S1/2-S36/37/39
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III
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UN 3265 8/PG 2
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2904100000
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C
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R34
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HS:2904100000.Derivatives containing only sulpho groups, their salts and ethyl esters |
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品名, 成分含量, 用途 |
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2904100000 仅含磺基的衍生物及其盐和乙酯。监管条件:无。增值税率:17.0%。退税率:9.0%。最惠国关税:5.5%。普通关税:30.0% |
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2904100000 derivatives containing only sulpho groups, their salts and ethyl esters。Supervision conditions:None。VAT:17.0%。Tax rebate rate:9.0%。MFN tariff:5.5%。General tariff:30.0% |
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由硫氰酸甲酯经硝酸氧化而得。将硝酸及效负水小心加热至80-88℃,分次加入硫氰酸甲酯,温度自动上升至105℃左右。待反应缓和后,加热到120℃、反应5小时,得粗品。将粗品用交换水冲稀,加25%氢氧化钡溶液调至pH值为8-9,过滤。滤液深缩至有结晶析出,结晶用甲醇洗去硝酸根,得甲烷磺酸钡。再将基加入交换水煮沸,趁热加硫酸分解,过滤,滤液减压浓缩至不出水为止,即得成品。另一种制法是由甲基异硫脲硫酸盐经氯化、氧化、水解而得。将甲基异硫脲硫酸盐加入水中,于20-25℃通入氯气,至溶液颜色转黄,并在瓶底出现油层、温度下降、排气管有大量余氯排出等现象,则为反应终点。反应液用氯仿提取,提取液经干燥后在60-62℃常压蒸出氯仿,然后减压蒸馏,收集60-65℃(2.67kPa)馏分,得甲基磺酰氯。将基在搅拌下滴加80℃热水中,保温水解约2h,至反应液内油滴状物完成消失为止。反应液减压浓缩至糖浆状,加水稀释,再减压浓缩至蒸不出水分为止,得甲烷磺酸。 | |
电子电镀。 |
