Barium Sulphate

CAS number：7727-43-7
Molecular formula: BaSO₄          Molecular weight: 233.40
Properties: Formless white powder , can be dissolved in fuming sulfuric acid and fused alkali , slightly dissolve in boiling hydrochloric acid. Stable chemical properties , easy to be produced mixed crystal with potassium permanganate, calcium carbonate, alkali metals, nitrate.

Use: Used as filling of paint, printing ink,latex, plastic,insulating tape , surface coating mixture of photographic paper,copper plate paper , sizing agent of textile goods , weight additive of drilling. Also used in the industries of pigment,pottery and porcelain,accumulator,glass.

Packaging, storage and transportation: Powder: packed in knitting bags lined with 6 silk plastic film.NW:25kg,50kg per bag. Paste form: packed in knitting bags lined with 6 silk plastic film , NW:40kg. Avoid moisture and drench when being stored and transported.

Quality standard National standard(GB2899-1996)

Index name		Index
		Top Grade	First Grade	Paste Form
Barium sulfate (base on dry basis) %		98.0	97.0	98.0
PH value		6.5-9.0	5.5-9.5	6.5-9.0
Insoluble substance in water%		0.30	0.30	0.20
105 volatile %		0.30	0.30	28.0
Ferrum(base on Fe) %		0.004	0.006	0.004
Oil absorption %		15-30	10-30	/
Whiteness		94	92	94
fineness(aperture 45um residue on sieve )%		0.20	0.20	0.10
Size distribution	10um %	80.0	/	90.0
	5um %	60.0	/	70.0
	2um %	25.0	/	50.0

 

 

 

分子式：BaCO3分子量：197.35外观： 白色无定形粉末 

基本规格：　　　　　　

项　　　目	指　　　标
	优等品	一等品	合格品
主含量（以BaCO3计） ≥	99.2%	99.0%	98.5%
总硫（以SO4计）　　 ≤	0.25%	0.35%	0.45%
盐酸不溶物灼烧残渣　≤	0.15%	0.25%	0.50%
铁（以Fe计）　　　　≤	0.004%	0.004%	0.008%
水分　　　　　　　　≤	0.30%	0.30%	0.30%
堆积密度　　　　　　≤	1.21g/cm3

　 用途：主要用于磁性材料、电子陶瓷、净化水、油漆、颜料、涂料、建筑材料及钢铁渗碳， 制造其他钡盐及试剂。