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
 
 
 
Product: Barium Carbonate
工业碳酸钡 
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。