天津天光光学仪器
第10楼2013/04/03
呵呵,您想的不错,我一买就是10多公斤,再细加工成粉末,销售给国外一些红外生产厂家,他们一买就是好几公斤。具体要求如下:Appearance: White fine crystalline powder or granules
IR : Conforms to structure
Assay : ≥99%pH : 5.0 - 8.8 (5% solution in H2O, 20 ℃)Additional Info. :H2O: 3250 - 3750/1620 - 1640 1/cm: <0.15, CH ompounds:
2750 - 3100 1/cm: <0.004, other: 420 -4000 1/cm: <0.015 (2 g pressed disk, 0.5 cm layer
thickness)