Material Safety Data Sheet
Date Printed: 06/FEB/2005
Date Updated: 13/JUL/2004
According to 91/155/EEC
Classified as Hazardous according to the criteria of EU Annex 1 and
1 - Product and Company Information
Product Name SODIUM HYDROSULFITE, TECH., CA. 85%
Product Number 157953
Company Sigma-Aldrich Pty, Ltd
Unit 2, 14 Anella Avenue
Castle Hill NSW 1765
Technical Phone # +61 2 9841 0555
Fax +61 2 9841 0500
Emergency Phone # +61 2 9841 0566
2 - Composition/Information on Ingredients
Product Name CAS # EC no Annex I
SODIUM HYDROSULFITE 7775-14-6 231-890-0 016-028-00-1
Molecular Weight 174.11 AMU
Synonyms SODIUM DITHIONITE
3 - Hazards Identification
SPECIAL INDICATION OF HAZARDS TO HUMANS AND THE ENVIRONMENT
May cause fire. Harmful if swallowed. Contact with acids liberates
4 - First Aid Measures
If inhaled, remove to fresh air. If not breathing give
artificial respiration. If breathing is difficult, give oxygen.
AFTER SKIN CONTACT
In case of skin contact, flush with copious amounts of water for
at least 15 minutes. Remove contaminated clothing and shoes.
Call a physician.
AFTER EYE CONTACT
In case of contact with eyes, flush with copious amounts of
water for at least 15 minutes. Assure adequate flushing by
separating the eyelids with fingers. Call a physician.
If swallowed, wash out mouth with water provided person is
conscious. Call a physician.
5 - Fire Fighting Measures
Dust Potential: This material, like most materials in powder
form, is capable of creating a dust explosion.
CONDITIONS OF FLAMMABILITY
Addition of small amounts of water or temperature's above 100掳C
may cause self ignition.
Suitable: Dry chemical powder.
Unsuitable: Do not use water.
Specific Hazard(s): Flammable solid. Emits toxic fumes under
SPECIAL PROTECTIVE EQUIPMENT FOR FIREFIGHTERS
Wear self-contained breathing apparatus and protective clothing
to prevent contact with skin and eyes.
6 - Accidental Release Measures
PERSONAL PRECAUTION PROCEDURES TO BE FOLLOWED IN CASE OF LEAK OR SPILL
Evacuate area. Shut off all sources of ignition. Use nonsparking
PROCEDURE(S) OF PERSONAL PRECAUTION(S)
Wear self-contained breathing apparatus, rubber boots, and heavy
METHODS FOR CLEANING UP
Cover with dry-lime, sand, or soda ash. Place in covered
containers using non-sparking tools and transport outdoors.
Ventilate area and wash spill site after material pickup is
7 - Handling and Storage
Directions for Safe Handling: Avoid contact with eyes, skin, and
clothing. Avoid breathing dust. Avoid prolonged or repeated
Conditions of Storage: Keep container closed. Keep away from
heat, sparks, and open flame. Store in a cool dry place.
Incompatible Materials: Do not allow contact with water Avoid
contact with acid.
SPECIAL REQUIREMENTS: Air sensitive.
8 - Exposure Controls / Personal Protection
Safety shower and eye bath. Use nonsparking tools. Mechanical
GENERAL HYGIENE MEASURES
Wash thoroughly after handling.
ALDRICH - 157953 www.sigma-aldrich.com Page 2
PERSONAL PROTECTIVE EQUIPMENT
Respiratory Protection: Government approved respirator.
Hand Protection: Compatible chemical-resistant gloves.
Eye Protection: Chemical safety goggles.
9 - Physical and Chemical Properties
Appearance Physical State: Solid
Property Value At Temperature or Pressure
BP/BP Range N/A
MP/MP Range 300 掳C
Flash Point N/A
Autoignition Temp N/A
Oxidizing Properties N/A
Explosive Properties N/A
Explosion Limits N/A
Vapor Pressure N/A
Partition Coefficient N/A
Vapor Density N/A
Saturated Vapor Conc. N/A
Evaporation Rate N/A
Bulk Density N/A
Decomposition Temp. N/A
Solvent Content N/A
Water Content N/A
Surface Tension N/A
Miscellaneous Data N/A
10 - Stability and Reactivity
Conditions to Avoid: Do not allow water to enter container because
of violent reaction. Air.
Materials to Avoid: Strong oxidizing agents, Acids.
HAZARDOUS DECOMPOSITION PRODUCTS
Hazardous Decomposition Products: Sulfur oxides, Sodium/sodium
Hazardous Polymerization: Will not occur
11 - Toxicological Information
SIGNS AND SYMPTOMS OF EXPOSURE
To the best of our knowledge, the chemical, physical, and
toxicological properties have not been thoroughly investigated.
ROUTE OF EXPOSURE
Skin Contact: May cause skin irritation.
Skin Absorption: May be harmful if absorbed through the skin.
Eye Contact: May cause eye irritation.
Inhalation: May be harmful if inhaled. Material may be
ALDRICH - 157953 www.sigma-aldrich.com Page 3
irritating to mucous membranes and upper respiratory tract.
Ingestion: Harmful if swallowed.
12 - Ecological Information
Test Type: LC50 Fish
Species: Leuciscus idus
Time: 96 h
Value: 10 - 100 mg/l
Test Type: EC50 Daphnia
Species: Daphnia magna
Time: 48 h
Value: 10 - 100 mg/l
Test Type: IC50 Algae
Time: 72 h
Value: > 100 mg/l
13 - Disposal Considerations
Contact a licensed professional waste disposal service to dispose
of this material. Burn in a chemical incinerator equipped with an
afterburner and scrubber but exert extra care in igniting as this
material is highly flammable. Observe all federal, state, and
local environmental regulations.
14 - Transport Information
Proper Shipping Name: Sodium dithionite (Sodium
Proper Shipping Name: SODIUM DITHIONITE
Marine Pollutant: No
Severe Marine Pollutant: No
Proper Shipping Name: SODIUM DITHIONITE
Inhalation Packing Group I: No
15 - Regulatory Information
CLASSIFICATION AND LABELING ACCORDING TO EU DIRECTIVES
ANNEX I INDEX NUMBER: 016-028-00-1
INDICATION OF DANGER: Xn
R-PHRASES: 7 22 31
May cause fire. Harmful if swallowed. Contact with acids
ALDRICH - 157953 www.sigma-aldrich.com Page 4
liberates toxic gas.
S-PHRASES: 7/8 26 28 43
Keep container tightly closed and dry. In case of contact with
eyes, rinse immediately with plenty of water and seek medical
advice. After contact with skin, wash immediately with plenty
of soap-suds. In case of fire, use dry powder. Never use water.
COUNTRY SPECIFIC INFORMATION
SWISS POISON CLASS: 3
16 - Other Information
The above information is believed to be correct but does not
purport to be all inclusive and shall be used only as a guide. The
information in this document is based on the present state of our
knowledge and is applicable to the product with regard to
appropriate safety precautions. It does not represent any
guarantee of the properties of the product. Sigma-Aldrich Inc.,
shall not be held liable for any damage resulting from handling or
from contact with the above product. See reverse side of invoice
or packing slip for additional terms and conditions of sale.
Copyright 2005 Sigma-Aldrich Co. License granted to make unlimited
paper copies for internal use only.
For R&D use only. Not for drug, household or other uses.
ALDRICH - 157953 www.sigma-aldrich.com Page 5