Crystal Quinone Pvt. Ltd

SODIUM BI SULPHITE
GRADE	TECHNICAL GRADE	SUPERFINE GRADE
CHEMICAL FORMULA	NaHSO3	NaHSO3
CAS No.	7631-90-5	7631-90-5
MOLECULAR WT.	104.60	104.60
PURITY
1) As SO2 CONTENT (by Iodometry method)	60 to 62%	62 to 64%
2) As NaHSO3 (mol.wt.104) (by Oxidation method with H2O2	97.0% Min.	98.0% Min.
APPEARANCE	WHITE TO PALE CREAM COLOUR CRYSTALLINE POWDER.	WHITE/ OFF WHITE COLOUR CRYSTALLINE POWDER
PH (5% Solution at 30°C)	4.5 to 5.5	4.5 to 5.0
IRON (As Fe)	150 PPM MAX	50 PPM MAX
HEAVY METALS (As Pb)	------	0.1% MAX
MATTER INSOLUBLE IN WATER (20% Solution in distilled water)	0.1% MAX	0.01% MAX
PACKING	50 KG BAG WITH LINER	50 KG BAG WITH LINER
USES	DYESTUFFS	DYESTUFFS,
	TANNERIES	TANNERIES,
	CHLORO ALKALI	CHLORO ALKALI
	EFFLUENTS TREATMENT	EFFLUENTS TREATMENT
		PHARMACEUTICALS

SPECIFICATION : SODIUM SULPHITE
GRADE	TECHNICAL GRADE-I	SUPERFINE GRADE-II
PROCESS	SODA ASH PROCESS	CAUSTIC PROCESS
CHEMICAL FORMULA	Na2 S O3	Na2 S O3
CAS No.	7757-83-7	7757-83-7
MOLECULAR WT.	126.04	126.04
ASSAY As Na2 S O3 (i) (ii)	98to 99 BY IODOMETRY METHOD 70 to 75% BY FORMALDEHYDE METHOD	94 to 96% BY IODOMETRY METHOD 94 to 96% BY FORMALDEHYDE METHOD.
APPEARANCE	WHITE/OFF WHITE CRYSTALLINE POWDER.	WHITE COLOUR CRYSTALLINE POWDER.
PH IN 10% SOLUTION AT 30°C	6.0 TO 7.5	9.0 TO 10.5
SOLUTION IN 10% DISTILLED WATER	HAZY PALE YELLOW	CLEAR & COLOURLESS
IRON (As Fe)	100 PPM MAX	20 PPM MAX
HEAVY METALS (As Pb)	100 PPM MAX	10 PPM MAX
MATTER INSOLUBLE IN WATER	0.15% MAX	0.05% MAX
FREE ALKALI	2.00% MAX	0.15% MAX
FREE ACIDITY (AS Na H SO3)	20 TO 30%	NIL
PACKING	50 KG BAG WITH LINER	25 KG BAG WITH LINER
USES	PAPER	PHOTOGRAPHY
	EFFLUENT TREATMENT	PHARMACEUTICALS
	DETERGENTS	REDUCING AGENT (DYES)
	DYES INTERMEDIATES	ANTIOXIDANT
		TEXTILES

SODIUM META BISULPHITE
	White-extra Pure	Technical Grade
Synonyms	1] SODIUM META BI SULPHITE 2] SODIUM PYROSULFITE 3] SODIUM DISULFITE	1] SODIUM META BI SULPHITE 2] SODIUM PYROSULFITE 3] SODIUM DISULFITE
Chemical Formula	Na2 S2O5	Na2 S2O5
Molecular Wt.	190.1	190.1
CAS No.	[7681–57-4]	[7681–57-4]
ASSAY (As Na2 S2 O5 ) (i)	96.00 % Min.	95.00 % Min
SO2 Content (ii)	65.00% Min	64.00% Min
Appearance	White Crystalline Powder	White Crystalline Powder
pH in 5% Solution	4.0 TO 4.5	4.0 TO 4.5
Matter Insoluble in water, Calcium, Magnesium and Ammonium hydroxide precipitate, percent by mass.	0.05% Max.	0.1% Max.
Iron (As Fe)	10 ppm Max. (0.0010% Max)	20 ppm Max.
Heavy Metals (As Pb)	20 ppm Max. (0.02% Max)	20 ppm Max. (0.02% Max)
Matter insoluble in water.	0.05% Max.	0.1% Max.
Thiosulphate content	0.05% Max	0.05% Max
Reaction to Ammoniacal Silver Nitrate	To pass Test.	To pass Test.
PACKING	50 KG Bag with LDPE liner inside.	50 KG Bag with LDPE liner inside.
Applications	Acrylic Fiber Industry	Acrylic Fiber Industry
	Electroplating	Electroplating
	Photography Chemicals	Photography Chemicals
	Pharmaceuticals	Pharmaceuticals
	Biscuits & Confectionery	Biscuits & Confectionery
	Dyestuff & Pigments	Dyestuff & Pigments