MERCK 106516.1000 Sodium Thiosulfate Pentahydrate GR, ACS, ISO CAS No.10102-17-7

Replacement Information
Replacement Information	In North America 106516.0500 replaces and is identical to SX0815-1

Key Spec Table

CAS #	EC Number	Hill Formula	Molar Mass	Grade Value
10102-17-7	231-867-5	Na₂O₃S₂ * 5 H₂O	248.18 g/mol	ACS,ISO,Reag. Ph Eur

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Description
Catalogue Number	106516
Replaces	SX0815-1; SX0815
Synonyms	Antichlor

Product Information
CAS number	10102-17-7
EC number	231-867-5
Grade	ACS,ISO,Reag. Ph Eur
Hill Formula	Na₂O₃S₂ * 5 H₂O
Molar Mass	248.18 g/mol
HS Code	2832 30 20
Quality Level	MQ300

Physicochemical Information
Density	1.74 g/cm3 (20 °C)
Melting Point	48 °C
pH value	6 - 7.5 (100 g/l, H₂O, 20 °C)
Bulk density	1000 kg/m3
Solubility	701 g/l

Toxicological Information
LD 50 oral	LD50 Rat > 5000 mg/kg

Safety Information according to GHS
RTECS	WE6660000
Storage class	10 - 13 Other liquids and solids
WGK	WGK 1 slightly hazardous to water
Disposal	28Aqueous solutions: Container D.

Storage and Shipping Information
Storage	Store at +2°C to +30°C.

Specifications
Assay (iodometric)	99.5 - 101.0 %
Identity	passes test
Appearance of solution	passes test
Insoluble matter	≤ 0.005 %
pH-value (5 %; water, 25 °C)	6.0 - 7.5
pH-value (10 %; water)	6.0 - 7.5
Chloride (Cl)	≤ 0.008 %
Sulfate and sulphite (as SO₄)	≤ 0.1 %
Sulfide (S)	passes test
Heavy metals (as Pb)	≤ 0.001 %
Total nitrogen (N)	≤ 0.002 %
Ca (Calcium)	≤ 0.002 %
Cu (Copper)	≤ 0.0005 %
Fe (Iron)	≤ 0.0005 %
K (Potassium)	≤ 0.001 %
Mg (Magnesium)	≤ 0.001 %
Pb (Lead)	≤ 0.0005 %
Corresponds to ACS, ISO, Reag. Ph Eur