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| CAS号 : | 867-44-7 |
精确质量 : | 187.99300 |
| 分子式 : | C2H8N2O4S2 |
logP : | 1.47090 |
| 分子量 : | 188.22600 |
PSA : | 158.15000 |
S-甲基异硫脲半硫酸盐 | |
2-Methyl-2-thiopseudourea sulfate | |
867-44-7 | |
C2H8N2O4S2 | |
188.22600 | |
158.15000 | |
1.47090 | |
187.99300 |
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白色结晶粉末
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37.7ºC
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138.8ºC at 760 mmHg
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240-241 °C (dec.)(lit.)
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1.28
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260 g/L (20 ºC)
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Stable. Incompatible with strong oxidizing agents.
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Store in a cool, dry, well-ventilated area away from incompatible substances. Keep containers tightly closed.
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UM9200000
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3
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S22-S24/25
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2930909090
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Xn
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R22
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2933990090
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2933990090. 其他仅含氮杂原子的杂环化合物. 增值税率:17.0%. 退税率:13.0%. 监管条件:无. 最惠国关税:6.5%. 普通关税:20.0% | |
2933990090. heterocyclic compounds with nitrogen hetero-atom(s) only. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0% |
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<p>其制备方法是将硫脲加入反应器中加入少许水,在搅拌情况下使硫脲部分溶解,冷水浴冷却下搅拌10min,再加入重蒸的硫酸二甲酯,迅速安装上两根球形冷凝管,以防暴沸,撤去冷水浴,反应自发进行放热,5min后突然暴沸,此时固体已大部分溶解,待回流减弱并平衡后,加热再回流1h,静置过夜,反应物固化,加入95%乙醇搅拌片刻,冰水冷却0.5h,过滤,用25%乙醇洗涤得成品。</p> | |
<p>医药中间体。</p> |
