SIGMA-ALDRICH
Material Safety Data Sheet
Date Printed: 18/MAY/2005
Date Updated: 12/MAR/2004
Version 1.3
According to 91/155/EEC
Classified as Hazardous according to the criteria of EU Annex 1 and
NOHSC.
1 - Product and Company Information
Product Name SELENIOUS ACID, 99.999%
Product Number 229857
Company Sigma-Aldrich Pty, Ltd
Unit 2, 14 Anella Avenue
Castle Hill NSW 1765
Australia
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
Index Number
SELENIOUS ACID 7783-00-8 231-974-7 034-002-00-8
Formula H2SeO3
Molecular Weight 128.97 AMU
Synonyms RCRA waste number U204 * Selenium dioxide
3 - Hazards Identification
SPECIAL INDICATION OF HAZARDS TO HUMANS AND THE ENVIRONMENT
Toxic by inhalation and if swallowed. Danger of cumulative
effects. Very toxic to aquatic organisms, may cause long-term
adverse effects in the aquatic environment.
4 - First Aid Measures
AFTER INHALATION
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.
AFTER INGESTION
If swallowed, wash out mouth with water provided person is
conscious. Call a physician immediately.
5 - Fire Fighting Measures
EXTINGUISHING MEDIA
Suitable: Carbon dioxide, dry chemical powder, or appropriate
foam.
SPECIAL RISKS
Specific Hazard(s): Emits toxic fumes under fire conditions.
Contact with other material may cause fire. May accelerate
combustion.
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.
PROCEDURE(S) OF PERSONAL PRECAUTION(S)
Wear self-contained breathing apparatus, rubber boots, and heavy
rubber gloves.
METHODS FOR CLEANING UP
Sweep up, place in a bag and hold for waste disposal. Avoid
raising dust. Ventilate area and wash spill site after material
pickup is complete.
7 - Handling and Storage
HANDLING
Directions for Safe Handling: Do not breathe dust. Do not get in
eyes, on skin, on clothing. Avoid prolonged or repeated exposure.
STORAGE
Conditions of Storage: Keep tightly closed. Keep away from
combustible materials, heat, sparks, and open flame. Store in a
cool dry place.
SPECIAL REQUIREMENTS: Hygroscopic.
8 - Exposure Controls / Personal Protection
ENGINEERING CONTROLS
Safety shower and eye bath. Use only in a chemical fume hood.
GENERAL HYGIENE MEASURES
Wash contaminated clothing before reuse. Wash thoroughly after
handling.
EXPOSURE LIMITS - DENMARK
Source Type Value
OEL TWA 0.1 mg/m3
EXPOSURE LIMITS - UNITED KINGDOM
Source Type Value
OEL TWA 0.1MG(SE)/M3
PERSONAL PROTECTIVE EQUIPMENT
Respiratory Protection: Government approved respirator.
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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
pH N/A
BP/BP Range N/A
MP/MP Range 70 掳C
Flash Point N/A
Flammability N/A
Autoignition Temp N/A
Oxidizing Properties N/A
Explosive Properties N/A
Explosion Limits N/A
Vapor Pressure N/A
SG/Density 3.004 g/cm3
Partition Coefficient N/A
Viscosity 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
Conductivity N/A
Miscellaneous Data N/A
Solubility N/A
10 - Stability and Reactivity
STABILITY
Stable: Stable.
Conditions to Avoid: Moisture.
Materials to Avoid: Strong reducing agents, Organic materials,
Finely powdered metals.
HAZARDOUS DECOMPOSITION PRODUCTS
Hazardous Decomposition Products: Selenium/selenium oxides.
HAZARDOUS POLYMERIZATION
Hazardous Polymerization: Will not occur
11 - Toxicological Information
RTECS NUMBER: VS7175000
ACUTE TOXICITY
LD50
Intravenous
Mouse
11 MG/KG
SIGNS AND SYMPTOMS OF EXPOSURE
Selenious acid is the most toxic form of selenium, ingestion is
almost invariably fatal. Stupor, respiratory depression,
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hypotension, and death can result several hours post ingestion.
Severe hypotension develops secondary both to decreased
contractility from a toxic cardiomyopathy and to inappropriately
low peripheral vascular resistance. Laboratory abnormalities
include thrombocytopenia, moderate hepatorenal dysfunction, and
elevated serum kinase levels. Chronic contact with selenium
compounds may cause garlic odor of breath and sweat, dermatitis,
and moderate emotional instability. 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: Toxic if inhaled. Material may be irritating to
mucous membranes and upper respiratory tract.
Ingestion: Toxic if swallowed.
TARGET ORGAN INFORMATION
Liver. Kidneys. Heart.
CHRONIC EXPOSURE - MUTAGEN
Human
10 UMOL/L
Cell Type: lymphocyte
Cytogenetic analysis
Mouse
10 MG/KG
Intraperitoneal
2D
Micronucleus test
12 - Ecological Information
No data available.
13 - Disposal Considerations
SUBSTANCE DISPOSAL
Contact a licensed professional waste disposal service to dispose
of this material. Observe all federal, state, and local
environmental regulations.
14 - Transport Information
RID/ADR
UN#: 3283
Class: 6.1
PG: II
Proper Shipping Name: Selenium compound, n.o.s.
IMDG
UN#: 3283
Class: 6.1
PG: II
Proper Shipping Name: Selenium compound, n.o.s.
Marine Pollutant: No
Severe Marine Pollutant: No
Technical Name: Required
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IATA
UN#: 3283
Class: 6.1
PG: II
Proper Shipping Name: Selenium compound, n.o.s.
Inhalation Packing Group I: No
Technical Name: Required
15 - Regulatory Information
CLASSIFICATION AND LABELING ACCORDING TO EU DIRECTIVES
ANNEX I INDEX NUMBER: 034-002-00-8
NOTA: A
INDICATION OF DANGER: T N
Toxic. Dangerous for the environment.
R-PHRASES: 23/25 33 50/53
Toxic by inhalation and if swallowed. Danger of cumulative
effects. Very toxic to aquatic organisms, may cause long-term
adverse effects in the aquatic environment.
S-PHRASES: 20/21 28 45 60 61
When using do not eat, drink, or smoke. After contact with
skin, wash immediately with plenty of soap-suds. In case of
accident or if you feel unwell, seek medical advice immediately
(show the label where possible). This material and its
container must be disposed of as hazardous waste. Avoid release
to the environment. Refer to special instructions/safety data
sheets.
16 - Other Information
WARRANTY
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.
DISCLAIMER
For R&D use only. Not for drug, household or other uses.
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