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Barium sulfate CAS#7727-43-7

Barium sulfate CAS#7727-43-7 Promotion Season Now in Store and Free Sample for Testing with Factory Price

Chemical Name：Barium sulfate

CAS No.:7727-73-7

Molecular Formula:BaSo4

Molecular weight:233.39

Sample: Available

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Product Details

Products Description of Direct Pigment Yellow 42 CAS#51274-00-1
Barium sulfate has its chemical formula BaSO4. It is colorless or white orthorhombic crystals with relative molecular mass of 233.4, the relative density of 4.5 (15 ℃), the melting point of 1580 ℃, and the Refractive index of 1.637. Upon being heated to 1149 ℃, it will become monoclinic crystalline when the refractive index is 1.649. It is almost insoluble in water with the solubility being 0.00022 at 18 ℃ and 0.0041 at 100 ℃. It is slightly soluble in concentrated sulfuric acid and soluble in carbonate alkali metal solution in which it is converted to barium carbonate; it is insoluble in other kinds of acid or base. In nature, it is existed in the barite mineral form. Upon co-heating with carbon (pulverized coal) to 800 ℃, it is reduced to soluble barium sulfide and carbon monoxide. It has a strong ability for absorbing X-rays with X-ray being impermeable to it. Therefore, it is medically used as the agent (barium meal) for X-rays on the gut and stomach. Barium sulfate is the only non-toxic barium salts. It can be used in analysis reagents, electronics, instrumentation, metallurgy and other industries. It can also be used as a white pigment and an administrated agent upon stomach X-ray angiography; it can also used as copper flux, drilling mud weight enlarging agent and the filling agent of rubber, paper, and plastic. It is produced from the reaction between sulfuric acid and barium chloride.

I-type barium sulfate: it is white loose powder and is odorless and tasteless.

II-type barium sulfate: it is refined from barite sulfate type minerals: barium sulfate. Calculated from the dry goods, the barium sulfate content should not be less than 97%. It is white loose powder, and is odorless and tasteless. Barium sulfate (Ⅰ type and Ⅱ type) are both insoluble in water, organic solvent, acid o and sodium hydroxide. It contains 58.85% of barium.

Barium sulfate Chemical Properties

Melting point	1580 °C
Boiling point	decomposes at 1580℃ [KIR78]
density	4.5
storage temp.	Storage temperature: no restrictions.
solubility	water: insoluble
form	powder
color	White to yellow
Specific Gravity	4.5
PH Range	7
PH	3.5-10.0 (100g/l, H2O, 20℃)suspension
Odor	wh. or ylsh. fine powd. free from grittiness, odorless, tasteless
Water Solubility	0.0022 g/L (50 ºC)
Crystal Structure	Barite
crystal system	Nogata
Merck	14,994
Solubility Product Constant (Ksp)	pKsp: 9.97
Space group	Pnma
Lattice constant	a/nmb/nmc/nmα/oβ/oγ/oV/nm30.89090.54670.7188909090
Dielectric constant	11.4（16.0℃）
Exposure limits	ACGIH: TWA 5 mg/m3 OSHA: TWA 15 mg/m3; TWA 5 mg/m3 NIOSH: TWA 10 mg/m3; TWA 5 mg/m3
Stability:	Stable.
LogP	-1.031 (est)
CAS DataBase Reference	7727-43-7(CAS DataBase Reference)
EPA Substance Registry System	Barium sulfate (7727-43-7)

Safety Information

Hazard Codes	Xn
Risk Statements	20/21/22-36/37/38
Safety Statements	22-24/25-36-26
OEB	B
OEL	TWA: 10 mg/m3 (total)
WGK Germany	-
RTECS	CR0600000
TSCA	Yes
HS Code	28332700
Hazardous Substances Data	7727-43-7(Hazardous Substances Data)
Toxicity	LD50 orally in Rabbit: > 20000 mg/kg