sodium dithionite
CAS No.: 7775-14-6
Synonyms:
Formula: Na2O4S2
Exact Mass: 173.90300
Molecular Weight: 174.10700
PSA: 118.68000
LogP: 0.39100
sodium dithionite 7775-14-6 MSDS
Name: Sodium Hydrosulfite Material Safety Data Sheet
Synonym: Sodium hydrosulphite; Sodium sulfoxylate; Sodium dithionite
CAS: 7775-14-6
Section 1 - Chemical Product   MSDS Name:Sodium Hydrosulfite Material Safety Data Sheet
Synonym:Sodium hydrosulphite; Sodium sulfoxylate; Sodium dithionite

Section 2 - COMPOSITION, INFORMATION ON INGREDIENTS
CAS# Chemical Name content EINECS#
7775-14-6 Sodium dithionite >85 231-890-0
Hazard Symbols: XN
Risk Phrases: 22 31 7

Section 3 - HAZARDS IDENTIFICATION
  EMERGENCY OVERVIEW
Harmful if swallowed. Contact with acids liberates toxic gas. May cause fire.Heat sensitive.
Potential Health Effects
Eye:
May cause lacrimation (tearing), blurred vision, and photophobia.
May cause chemical conjunctivitis and corneal damage.
Skin:
May cause skin irritation and possible burns.
Ingestion:
May cause nausea, vomiting, abdominal pain, and increased salivation.
Inhalation:
Inhalation of dust may cause respiratory tract irritation. Olfactory fatigue may occur.
Chronic:
No information found.

Section 4 - FIRST AID MEASURES
  Eyes: Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid immediately.
Skin:
Get medical aid if irritation develops or persists. Wash clothing before reuse. Flush skin with plenty of soap and water.
Ingestion:
Do not induce vomiting. If victim is conscious and alert, give 2-4 cupfuls of milk or water. Never give anything by mouth to an unconscious person. Get medical aid immediately.
Inhalation:
Remove from exposure and move to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid. Do NOT use mouth-to-mouth resuscitation.
Notes to Physician:

Section 5 - FIRE FIGHTING MEASURES
  General Information:
Evacuate area and fight fire from a safe distance. As in any fire, wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. Use water spray to keep fire-exposed containers cool. Use water with caution and in flooding amounts.
Combustible solid. May decompose explosively when heated or involved in a fire. Powerful reducing agent. Closed containers may rupture violently when heated. Heats spontaneously in contact with air, especially moist air, and may ignite surrounding combustible materials.
Extinguishing Media:
Use dry sand or earth to smother fire. If water is the only media available, use in flooding amounts.

Section 6 - ACCIDENTAL RELEASE MEASURES
  General Information: Use proper personal protective equipment as indicated in Section 8.
Spills/Leaks:
Sweep up or absorb material, then place into a suitable clean, dry, closed container for disposal. Scoop up with a nonsparking tool, then place into a suitable container for disposal. Avoid generating dusty conditions. Remove all sources of ignition. Place under an inert atmosphere. Do not get water inside containers. Control runoff and isolate discharged material for proper disposal.

Section 7 - HANDLING and STORAGE
  Handling:
Use only in a well-ventilated area. Minimize dust generation and accumulation. Avoid contact with eyes, skin, and clothing. Empty containers retain product residue, (liquid and/or vapor), and can be dangerous. Keep away from heat, sparks and flame. Avoid ingestion and inhalation. Handle under an inert atmosphere. Store protected from air. Do not allow contact with water. Do not pressurize, cut, weld, braze, solder, drill, grind, or expose empty containers to heat, sparks or open flames. Keep from contact with moist air and steam.
Storage:
Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances. Do not expose to air. Store protected from moisture. Store under an inert atmosphere. Isolate from oxidizing materials and acids. Should not be exposed to temperatures above 122F (50C). Do not store in an area equipped with emergency water sprinklers. Consider equipping storage facilities with sulfur dioxide detectors.

Section 8 - EXPOSURE CONTROLS, PERSONAL PROTECTION
  Engineering Controls:
Facilities storing or utilizing this material should be equipped with an eyewash facility and a safety shower. Use adequate general or local explosion-proof ventilation to keep airborne levels to acceptable levels.
Exposure Limits CAS# 7775-14-6: Personal Protective Equipment Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166.
Skin:
Wear appropriate protective gloves to prevent skin exposure.
Clothing:
Wear appropriate protective clothing to prevent skin exposure.
Respirators:
Follow the OSHA respirator regulations found in 29 CFR 1910.134 or European Standard EN 149. Use a NIOSH/MSHA or European Standard EN 149 approved respirator if exposure limits are exceeded or if irritation or other symptoms are experienced.

Section 9 - PHYSICAL AND CHEMICAL PROPERTIES
 
Physical State: Crystalline powder
Color: white
Odor: penetrating odor - sulfur dioxide odor
pH: Not available.
Vapor Pressure: Not available.
Viscosity: Not available.
Boiling Point: Not available.
Freezing/Melting Point: 55 deg C
Autoignition Temperature: > 80 deg C (> 176.00 deg F)
Flash Point: Not applicable.
Explosion Limits, lower: Not available.
Explosion Limits, upper: Not available.
Decomposition Temperature: 70-130 deg C
Solubility in water: 25 g/100ml (20C)
Specific Gravity/Density: 1.4
Molecular Formula: Na2O4S2
Molecular Weight: 174.10

Section 10 - STABILITY AND REACTIVITY
  Chemical Stability:
Stable under normal temperatures and pressures.
Conditions to Avoid:
Ignition sources, dust generation, exposure to air, excess heat, moisture, high humidity.
Incompatibilities with Other Materials:
Strong oxidizing agents, strong acids.
Hazardous Decomposition Products:
Carbon monoxide, oxides of sulfur, carbon dioxide.
Hazardous Polymerization: Has not been reported.

Section 11 - TOXICOLOGICAL INFORMATION
  RTECS#:
CAS# 7775-14-6 unlisted.
LD50/LC50:
Not available.
Carcinogenicity:
Sodium dithionite - Not listed by ACGIH, IARC, or NTP.

Section 12 - ECOLOGICAL INFORMATION
  Other No information available.

Section 13 - DISPOSAL CONSIDERATIONS
  Dispose of in a manner consistent with federal, state, and local regulations.

Section 14 - TRANSPORT INFORMATION
 
IATA
Shipping Name: SODIUM DITHIONITE
Hazard Class: 4.2
UN Number: 1384
Packing Group: II
IMO
Shipping Name: SODIUM DITHIONITE
Hazard Class: 4.2
UN Number: 1384
Packing Group: II
RID/ADR
Shipping Name: SODIUM DITHIONITE
Hazard Class: 4.2
UN Number: 1384
Packing group: II

Section 15 - REGULATORY INFORMATION
 
European/International Regulations
European Labeling in Accordance with EC Directives
Hazard Symbols: XN
Risk Phrases:
R 22 Harmful if swallowed.
R 31 Contact with acids liberates toxic gas.
R 7 May cause fire.
Safety Phrases:
S 7/8 Keep container tightly closed and dry.
S 26 In case of contact with eyes, rinse immediately
with plenty of water and seek medical advice.
S 28A After contact with skin, wash immediately with
plenty of water.
S 43E In case of fire, use dry sand (never use
water).
WGK (Water Danger/Protection)
CAS# 7775-14-6: 1
Canada
CAS# 7775-14-6 is listed on Canada's DSL List.
CAS# 7775-14-6 is not listed on Canada's Ingredient Disclosure List.
US FEDERAL
TSCA
CAS# 7775-14-6 is listed on the TSCA inventory.


SECTION 16 - ADDITIONAL INFORMATION
N/A

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