Chloromethane · CH₃Cl · CAS 74-87-3
CH₃Cl
Chloromethane
一氯甲烷（氯甲烷，CH₃Cl）是一种气态氯代甲烷，以可重复充装钢瓶及槽罐规格供应。我们的企业特级纯度可达 99.98%。它是有机硅单体和甲基纤维素的主要原料，也是化工合成中常用的高纯度甲基化试剂。
一氯甲烷（CH3Cl）— 企业特级纯度 99.98%
| CAS 号 | 74-87-3 |
|---|---|
| 分子式 | CH₃Cl |
| 分子量 | 50.49 |
| 别名 | Methyl chloride, Refrigerant R-40 |
| 执行标准 | HG/T 3674-2018; Enterprise Standard |
所列数值除注明外均为百分比（%）；“—”表示该牌号无此项限值。
| 项目 | Ent. Special | Ent. Premium | HG/T Superior | HG/T First | HG/T Qualified |
|---|---|---|---|---|---|
| Appearance | Colorless transparent liquid when liquefied | Colorless transparent liquid when liquefied | Colorless transparent liquid when liquefied | Colorless transparent liquid when liquefied | Colorless transparent liquid when liquefied |
| Methyl chloride content, % ≥ | 99.98 | 99.90 | 99.90 | 99.80 | 99.50 |
| Dimethyl ether, % ≤ | 0.0005 | 0.0100 | — | — | — |
| Ethyl chloride, % ≤ | 0.0010 | 0.0200 | — | — | — |
| Methanol + ethanol, % ≤ | 0.0005 | 0.0020 | — | — | — |
| Moisture, % ≤ | 0.0050 | 0.0050 | 0.0050 | 0.0100 | 0.0150 |
| Acidity (as HCl), % ≤ | 0.0005 | 0.0010 | 0.0010 | 0.0020 | 0.0025 |
| Evaporation residue, % ≤ | 0.0008 | 0.0008 | 0.0020 | 0.0020 | 0.0050 |
| Product form | Compressed liquefied gas, supplied in refillable cylinders |
|---|---|
| Synonym | Refrigerant R-40 |
| Supply modes | 40 / 70 / 400 / 800 L cylinders; tank |
储存于干燥通风处，避免日晒雨淋。按易燃压缩气体危险品法规运输。