Material Safety Data Sheet
Selenious acid

ACC# 88641
Section 1 - Chemical Product and Company Identification
MSDS Name: Selenious acid
Catalog Numbers: AC198870000, AC198870500, AC198872500
Synonyms:
Monohydrated selenium dioxide; selenous acid.
Company Identification:

              Acros Organics N.V.
              One Reagent Lane
              Fair Lawn, NJ 07410
For information in North America, call: 800-ACROS-01
For emergencies in the US, call CHEMTREC: 800-424-9300

Section 2 - Composition, Information on Ingredients

CAS# Chemical Name Percent EINECS/ELINCS
7783-00-8 Selenious acid 98 231-974-7

Section 3 - Hazards Identification

EMERGENCY OVERVIEW

Appearance: white powder.
Danger! May be fatal if inhaled or swallowed. May cause severe eye irritation and possible injury. May cause respiratory and digestive tract burns. May cause severe skin irritation. May cause liver and kidney damage. Hygroscopic (absorbs moisture from the air).
Target Organs: Kidneys, liver, eyes, skin, mucous membranes.


Potential Health Effects
Eye: May cause severe eye irritation. May result in corneal injury.
Skin: May cause severe skin irritation. May be absorbed through the skin in harmful amounts. Prolonged and/or repeated contact may cause irritation and/or dermatitis.
Ingestion: May be fatal if swallowed. May cause liver and kidney damage. May cause burns to the digestive tract.
Inhalation: May be fatal if inhaled. May cause severe irritation of the respiratory tract with sore throat, coughing, shortness of breath and delayed lung edema.
Chronic: Symptoms demonstrated by humans suffering from chronic selenium intoxication, selenosis, include depression, languor, nervousness, dermatitis, gastrointestinal disturbances, giddiness, garlic odor of the breath and sweat, moderate emotional instability, excess dental caries, and in extreme cases, loss of fingernails and partial alopecia (hair loss).

Section 4 - First Aid Measures


Eyes: In case of contact, immediately flush eyes with plenty of water for a t least 15 minutes. Get medical aid immediately.
Skin: In case of contact, immediately flush skin with plenty of water for at least 15 minutes while removing contaminated clothing and shoes. Get medical aid immediately. Wash clothing before reuse.
Ingestion: POISON material. If swallowed, get medical aid immediately. Only induce vomiting if directed to do so by medical personnel. Never give anything by mouth to an unconscious person.
Inhalation: POISON material. If inhaled, get medical aid immediately. Remove victim to fresh air. If not breathing, give artificial respiration. If breathing is difficult, give oxygen.
Notes to Physician: Treat symptomatically and supportively.

Section 5 - Fire Fighting Measures


General Information: As in any fire, wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear.
Extinguishing Media: Use extinguishing media most appropriate for the surrounding fire.
Flash Point: Not applicable.
Autoignition Temperature: Not applicable.
Explosion Limits, Lower:Not available.
Upper: Not available.
NFPA Rating: (estimated) Health: 3; Flammability: 0; Instability:

Section 6 - Accidental Release Measures


General Information: Use proper personal protective equipment as indicated in Section 8.
Spills/Leaks: Vacuum or sweep up material and place into a suitable disposal container. Avoid generating dusty conditions. Provide ventilation.

Section 7 - Handling and Storage


Handling: Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Minimize dust generation and accumulation. Do not breathe dust, mist, or vapor. Do not get in eyes, on skin, or on clothing. Do not ingest or inhale. Use only with adequate ventilation or respiratory protection.
Storage: Store in a cool, dry place. Store in a tightly closed container. Poison room locked.

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 exhaust ventilation to keep airborne concentrations below the permissible exposure limits. Use process enclosure, local exhaust ventilation, or other engineering controls to control airborne levels.
Exposure Limits
Chemical Name ACGIH NIOSH OSHA - Final PELs
Selenious acid 0.2 mg/m3 TWA (as Se) (listed under Selenium compounds). 0.2 mg/m3 TWA (as Se, except Selenium hexafluoride) (listed under Selenium compounds).1 mg/m3 IDLH (as Se) (listed under Selenium compounds). 0.2 mg/m3 TWA (as Se) (listed under Selenium compounds).

OSHA Vacated PELs: Selenious acid: No OSHA Vacated PELs are listed for this chemical.
Personal Protective Equipment
Eyes: Wear chemical splash goggles.
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: Powder
Appearance: white
Odor: Not available.
pH: Not available.
Vapor Pressure: Not available.
Vapor Density: Not available.
Evaporation Rate:Not available.
Viscosity: Not available.
Boiling Point: Not available.
Freezing/Melting Point:70 deg C (dec)
Decomposition Temperature:70 deg C
Solubility: Readily soluble in water
Specific Gravity/Density:Not available.
Molecular Formula:H2SeO3
Molecular Weight:128.97

Section 10 - Stability and Reactivity


Chemical Stability: Stable under normal temperatures and pressures.
Conditions to Avoid: Dust generation, moisture, excess heat.
Incompatibilities with Other Materials: Strong reducing agents, finely powdered metals.
Hazardous Decomposition Products: Selenium/selenium oxides.
Hazardous Polymerization: Will not occur.

Section 11 - Toxicological Information


RTECS#:      
CAS# 7783-00-8: VS7175000
LD50/LC50:
Not available.
Oral rat LDLo: 25 mg/kg.
Carcinogenicity:
CAS# 7783-00-8: Not listed by ACGIH, IARC, NTP, or CA Prop 65.

Epidemiology: The epidemiologic data provide no evidence that selenium is carcinogenic in humans. There is extensive literature on the clinical toxicology and the incidence of selenium poisoning as a result of ingestion of seleniferous grains and other foodstuffs;however, there have been no reports of disabling chronic disease or death from industrial exposures.
Teratogenicity: No data available.
Reproductive Effects: No data available.
Mutagenicity: No data available.
Neurotoxicity: No data available.
Other Studies:

Section 12 - Ecological Information


Ecotoxicity: No data available. No information available.
Environmental: No information available.
Physical: No information available.
Other: Fungicide.

Section 13 - Disposal Considerations

Chemical waste generators must determine whether a discarded chemical is classified as a hazardous waste. US EPA guidelines for the classification determination are listed in 40 CFR Parts 261.3. Additionally, waste generators must consult state and local hazardous waste regulations to ensure complete and accurate classification.
RCRA P-Series: None listed.
RCRA U-Series:
CAS# 7783-00-8: waste number U204.

Section 14 - Transport Information

US DOT Canada TDG
Shipping Name: SELENIUM COMPOUND, SOLID, N.O.S. SELENIUM COMPOUNDS, NOS (SELENIOUS ACID)
Hazard Class: 6.1 6.1
UN Number: UN3283 UN3283
Packing Group: II III

Section 15 - Regulatory Information

US FEDERAL

TSCA
     CAS# 7783-00-8 is listed on the TSCA inventory.
Health & Safety Reporting List
     None of the chemicals are on the Health & Safety Reporting List.
Chemical Test Rules
     None of the chemicals in this product are under a Chemical Test Rule.
Section 12b
     None of the chemicals are listed under TSCA Section 12b.
TSCA Significant New Use Rule
     None of the chemicals in this material have a SNUR under TSCA.
CERCLA Hazardous Substances and corresponding RQs
     CAS# 7783-00-8: 10 lb final RQ; 4.54 kg final RQ
SARA Section 302 Extremely Hazardous Substances
     CAS# 7783-00-8: 1000 lb lower threshold TPQ; 10000 lb upper threshold      TPQ
SARA Codes
     CAS # 7783-00-8: immediate.
Section 313
     This material contains Selenious acid (listed as Selenium compounds), 98%, (CAS# 7783-00-8) which is subject to the reporting requirements of Section 313 of SARA Title III and 40 CFR Part 373.
Clean Air Act:
     CAS# 7783-00-8 (listed as Selenium compounds) is listed as a hazardous      air pollutant (HAP).
     This material does not contain any Class 1 Ozone depletors.
     This material does not contain any Class 2 Ozone depletors.
Clean Water Act:
     None of the chemicals in this product are listed as Hazardous Substances under the CWA.
     None of the chemicals in this product are listed as Priority Pollutants under the CWA. CAS# 7783-00-8 is listed as a Toxic Pollutant under the Clean Water Act.
OSHA:
     None of the chemicals in this product are considered highly hazardous by OSHA.
STATE
     CAS# 7783-00-8 can be found on the following state right to know lists: California, (listed as Selenium compounds), New Jersey, Pennsylvania, Minnesota, (listed as Selenium compounds), Massachusetts.

California Prop 65

California No Significant Risk Level: None of the chemicals in this product are listed.

European/International Regulations

European Labeling in Accordance with EC Directives
Hazard Symbols:
     T N
Risk Phrases:

     R 23/25 Toxic by inhalation and if swallowed.
     R 33 Danger of cumulative effects.
     R 50/53 Very toxic to aquatic organisms, may cause long-term
     adverse effects in the aquatic environment.

Safety Phrases:

     S 20/21 When using do not eat, drink or smoke.
     S 45 In case of accident or if you feel unwell, seek medical advice
     immediately (show the label where possible).
     S 60 This material and its container must be disposed of as hazardou
     s waste.
     S 28A After contact with skin, wash immediately with plenty of water
     .
     S 61 Avoid release to the environment. Refer to special instructions
     /safety data sheets.

WGK (Water Danger/Protection)

     CAS# 7783-00-8: No information available.
Canada - DSL/NDSL
     CAS# 7783-00-8 is listed on Canada's DSL List.
Canada - WHMIS
     not available.
This product has been classified in accordance with the hazard criteria of the Controlled Products Regulations and the MSDS contains all of the information required by those regulations.
Canadian Ingredient Disclosure List
     CAS# 7783-00-8 is listed on the Canadian Ingredient Disclosure List.

Section 16 - Additional Information

MSDS Creation Date: 12/12/1997
Revision #5 Date: 11/20/2008

The information above is believed to be accurate and represents the best information currently available to us. However, we make no warranty of merchantability or any other warranty, express or implied, with respect to such information, and we assume no liability resulting from its use. Users should make their own investigations to determine the suitability of the information for their particular purposes. In no event shall Fisher be liable for any claims, losses, or damages of any third party or for lost profits or any special, indirect, incidental, consequential or exemplary damages, howsoever arising, even if Fisher has been advised of the possibility of such damages.