HG3-19993-1976化学试剂顺丁烯二酸酐.pdf 2页

'中华人民共和国石油化学工业部部标准HG3一993一76化学试剂代替HGB3376--60匝丁烯二酸配本试剂为无色结晶或白色粉末，溶于水、醉、醚、三氯甲烷及丙酮。分子式C,H=(),结构式:0广H-4一一C}!》H-C-C、)分子量:98.06按1975年国际原子量)一、技术条件1.C,H葬)3含量不少于分析纯····························································.··⋯⋯99.5%;化学纯············································，························⋯⋯98.5%e2.熔点范围(C):分析纯··························，····································⋯⋯52.0^54.0;化学纯·······························································⋯⋯51.0-54.03.杂质最高含量(指标以00计):名称分析纯化学纯(”澄请度试验合格合格0J(2)水不溶物05(3)灼烧残渣(以硫酸盐计)以(1)氮化物(Cl)二、检验规则按GB619-77之规定进行取样及验收三、试验方法测定中所需标准溶液、杂质标准液、制剂及制品按GB601-77,GB602--77,GB603-77之规定制备发布中华人民共和国石油化学工业部提出1977年10月1日实施天津市化工局夭澎市化学试剂一厂起草1235 HG3一993一76}.C,H,O:含量测定:称取。.7克样品，称准至。.0002克。溶于50毫升不含二氧化碳的水中，加2滴1%酚酞指示液，用。.5N氢氧化钠标准溶液滴定至溶液呈粉红色。C.H式)。含量%(X)按下式计算V。CX0.04903又100G式中:V一氢氧化钠标准溶液之用量，毫升;C氢氧化钠标准溶液之当量浓度，N;G—样品重量，克;().04903—每毫克当量C4H,O。之克数。2.熔点测定:按GB617-77之规定测定。3.杂质测定:样品须称准至。.01克。(1)澄清度试验:称取10克样品，溶于100毫升热水中。其浊度不得大于澄清度标准:分析纯········································································⋯⋯3号;化学纯·······································································⋯⋯5号。(2)水不溶物:称取10克样品，溶于10。毫升热水中，用4号恒重玻璃滤祸过滤，以热水洗涤滤渣至无酸性反应，于105一110C烘至恒重，滤渣重量不得大于:分析纯··································································⋯⋯。.5毫克;化学纯··································································⋯⋯1.。毫克。(3)灼烧残渣:称取20克样品，置于恒重柑锅中，加热炭化，冷却。加1毫升硫酸，加热至硫酸蒸气逸尽。于800C灼烧至恒重，残渣重量不得大于:分析纯·····································································⋯⋯2毫克;化学纯··································································⋯⋯10毫克。(4)氯化物:称取。.5克样品，溶于50毫升水中。取10毫升，稀释至25毫升，加2毫升5N硝酸及1毫升一。.1N硝酸银，摇匀，放置10分钟。所呈浊度不得大于标准:标准是取下列数量的Gl:分析纯······························································⋯⋯。.01毫克;化学纯·······························································⋯⋯。.05毫克。释释至25毫升，与同体积样品溶液同时同样处理四、包装及标志1.包装:按HG3--119-64之规定。内包装形式:G-2,Gz-2;外包装形式:1-1;包装单位:第3,4类。2.标志:按HG3-119-64之规定1236'