1.06507

Sodium dithionite

for analysis EMSURE^®

• Synonym(s): Sodium dithionite, Sodium hydrosulfite, Sodium hypodisulfite
• Empirical Formula (Hill Notation): Na₂O₄S₂
• CAS Number: 7775-14-6
• Molecular Weight: 174.11
• MDL number: MFCD00011640
• UNSPSC Code: 12352302
• EC Index Number: 231-890-0

Properties

• Quality Level: 300
• product line: EMSURE^®
• Assay: ≥85.0% (iodometric)
• form: powder
• autoignition temp.: >200 °C
• potency: 2500 mg/kg LD₅₀, oral (Rat)
• pH: 5.5-8.5 (20 °C, 50 g/L in H₂O)
• mp: 100 °C (decomposition)
• transition temp: flash point >100 °C
• solubility: 250 g/L (slow decomposition)
• density: 2.5 g/cm³ at 20 °C
• bulk density: 1250 kg/m³
• anion traces: chloride (Cl^-): ≤0.01%
• cation traces: Fe: ≤0.002%
• storage temp.: 2-30°C
• InChI: 1S/2Na.H2O4S2/c;;1-5(2)6(3)4/h;;(H,1,2)(H,3,4)/q2*+1;/p-2
• InChI key: JVBXVOWTABLYPX-UHFFFAOYSA-L

Description

Linkage

Replaces: SX0530; SX0530-1

Analysis Note

Assay (iodometric): ≥ 85 %
Identity: passes test
Chloride (Cl): ≤ 0.01 %
Fe (Iron): ≤ 0.002 %

Legal Information

EMSURE is a registered trademark of Merck KGaA, Darmstadt, Germany

Safety Information

• Pictograms: GHS02,GHS07
• Signal Word: Danger
• Hazard Statements: H251 - H302 - H319
• Precautionary Statements: P235 - P264 - P270 - P280 - P301 + P312 - P305 + P351 + P338
• Hazard Classifications: Acute Tox. 4 Oral - Eye Irrit. 2 - Self-heat. 1
• Supplementary Hazards: EUH031
• Storage Class Code: 4.2 - Pyrophoric and self-heating hazardous materials
• WGK: WGK 1
• Flash Point(F): 212.0 °F
• Flash Point(C): > 100 °C