是酸的俗称，是化（hcl）气体的水溶液，溶质为一元强酸。具有极强的挥发性，因此打开盛有浓的容器后能在其上方看到酸雾，为化挥发后与空气中的水蒸气结合产生的小液滴。是一种常见的化学品和化工原料，有许多应用，包括家居清洁、食品添加剂、除锈、皮革加工等。世界年产量约2000万吨。市售一般质量分数为37%（约12mol/l）。胃酸的主要成分也是稀。既是盐化工的重要产品，又是生产硅材料的重要原料。 .baseinfowrap{display:inline-block;width:790px;font-size:12px;position:relative;z-index:10;background:url(tatic/lemma/view/img/baseinfobarbg_8955c10c.png);margin:0 0 -6px 0}.baseinfowrap .baseinfoleft,.baseinfowrap .baseinforight{float:left;_width:395px}.baseinfowrap .baseinfoleft .biopen,.baseinfowrap .baseinfoleft .biclose,.baseinfowrap .baseinforight .biopen,.baseinfowrap .baseinforight .biclose{position:absolute;color:#999;line-height:12px;*line-height:14px;width:36px;text-align:right;cuor:pointer}.baseinfowrap .baseinfoleft .biitem,.baseinfowrap .baseinforight .biitem{zoom:1;line-height:26px;position:relative}.baseinfowrap .baseinfoleft .biitem .biiteminner,.baseinfowrap .baseinforight .biitem .biiteminner{zoom:1;position:relative;overflow:hidden}.baseinfowrap .baseinfoleft .biitem .biiteminner .bititle,.baseinfowrap .baseinforight .biitem .biiteminner .bititle{display:block;float:left;color:#999;width:78px;padding:0 5px 0 12px;font-weight:bold}.baseinfowrap .baseinfoleft .biitem .biiteminner .bicontent,.baseinfowrap .baseinforight .biitem .biiteminner .bicontent{zoom:1;color:#333;width:300px;float:left;position:relative}.baseinfowrap .baseinfoleft .biitem .biiteminner .bicontent .biopen,.baseinfowrap .baseinforight .biitem .biiteminner .bicontent .biopen{bottom:6px;right:14px}.baseinfowrap .baseinfoleft .biitem .biopenitem,.baseinfowrap .baseinforight .biitem .biopenitem{display:none;position:absolute;left:0;top:-4px;border:1px solid #d4d4d4;padding:3px 11px;background:#fbfbfb;overflow:hidden;box-shadow:0 1px 5px #ddd;z-index:56}.baseinfowrap .baseinfoleft .biitem .biopenitem .biopenitemcon,.baseinfowrap .baseinforight .biitem .biopenitem .biopenitemcon{background:url(tatic/lemma/view/img/baseinfobaropenbg_aca4f7ef.png);overflow:hidden}.baseinfowrap .baseinfoleft .biitem .biopenitem .biopenitemcon .biopentitle,.baseinfowrap .baseinforight .biitem .biopenitem .biopenitemcon .biopentitle{display:block;width:78px;float:left;color:#999;font-weight:bold;padding-right:5px}.baseinfowrap .baseinfoleft .biitem .biopenitem .biopenitemcon .biopencontent,.baseinfowrap .baseinforight .biitem .biopenitem .biopenitemcon .biopencontent{width:288px;float:left}.baseinfowrap .baseinfoleft .biitem .biopenitem .biclose,.baseinfowrap .baseinforight .biitem .biopenitem .biclose{right:13px;bottom:10px}.baseinfowrap .baseinfoleft .biitem .biopenitem .biopencoverup,.baseinfowrap .baseinforight .biitem .biopenitem .biopencoverup{position:absolute;bottom:0;left:0;width:424px;height:4px;z-index:1;background:#fbfbfb;overflow:hidden}.baseinfowrap .baseinfoleft .bihighthierarchy,.baseinfowrap .baseinforight .bihighthierarchy{z-index:58}.baseinfowrap .biborderbottom{position:absolute;left:0;bottom:0;width:790px;height:1px;background:#eee}.baseinfowrap a{text-decoration:none}.baseinfowrap a:hover{text-decoration:underline}.arrow-up,.arrow-up-in,.arrow-down,.arrow-down-in{border-width:0 4px 4px;border-style:dashed dashed solid;border-top-color:traparent;border-left-color:traparent;border-right-color:traparent;border-color:traparent traparent #b4b4b4;z-index:1;position:absolute;left:0;top:4px;*top:-10px;_top:-10px}.arrow-up-in{border-bottom-color:#fff;top:5px;*top:-9px;_top:-9px}.arrow-down,.arrow-down-in{border-width:4px 4px 0;border-style:solid dashed dashed;border-top-color:#b4b4b4;border-bottom-color:traparent;*top:4px;_top:4px}.arrow-down-in{border-top-color:#fff;top:3px}.small-screen .baseinfowrap{width:690px}.small-screen .baseinfowrap .baseinfoleft,.small-screen .baseinfowrap .baseinforight{_width:345px}.small-screen .baseinfowrap .baseinfoleft .biitem .biiteminner .bicontent,.small-screen .baseinfowrap .baseinforight .biitem .biiteminner .bicontent{width:250px}.small-screen .baseinfowrap .baseinfoleft .biitem .biopenitem .biopenitemcon .biopencontent,.small-screen .baseinfowrap .baseinforight .biitem .biopenitem .biopenitemcon .biopencontent{width:238px} 联系人1383781111