سدیم تنگستات 2 آبه 106673 مرک

Description
Catalogue Number	106673

Product Information
CAS number	10213-10-2
EC number	236-743-4
Hill Formula	Na₂O₄W * 2 H₂O
Chemical formula	Na₂WO₄ * 2 H₂O
Molar Mass	329.86 g/mol
HS Code	2841 80 00

Applications
Application	Sodium tungstate dihydrate for analysis EMSURE®. CAS No. 10213-10-2, EC Number 236-743-4.

Physicochemical Information
Density	3.23 g/cm3 (20 °C)
Melting Point	100 °C Elimination of water of crystallisation
pH value	8 - 9 (50 g/l, H₂O, 20 °C)
Bulk density	1600 kg/m3
Solubility	730 g/l

Toxicological Information
LD 50 oral	LD50 Rat 1190 mg/kg

Safety Information according to GHS
Hazard Pictogram(s)
Hazard Statement(s)	H302: Harmful if swallowed.
RTECS	YO7900000
Storage class	10 - 13 Other liquids and solids
WGK	WGK 1 slightly water endangering
Disposal	14 Inorganic salts: Container I. Neutral solutions of the these salts: Container D. Before placing in Container D, check the pH with pH-Universal indicator strips (Item No. 109535).

Safety Information
Hazard Symbols	Harmful
Categories of danger	harmful
R Phrase	R 22 Harmful if swallowed.

Storage and Shipping Information
Storage	Store at +15°C to +25°C.

Specifications
Assay (thermogravimetric)	≥ 99 %
Identity (x-ray diffraction)	passes test
Free alkali (as NaOH)	≤ 0.05 %
Chloride (Cl)	≤ 0.003 %
Sulphate (SO₄)	≤ 0.01 %
Total nitrogen (N)	≤ 0.001 %
Fe (Iron)	≤ 0.0005 %
Mo (Molybdenum)	≤ 0.005 %
Pb (Lead)	≤ 0.001 %