Selenious Acid Pure and USP Grade Manufacturers, with SDS MSDS

Supplier, Manufacturer, Exporter of Selenious Acid, Muby Chemicals of Mubychem Group, established in 1976, is the original manufacturers of Specialty Chemicals, Pharmaceutical Excipient, Fragrance Food & Flavor chemicals, Reagent Grade Chemicals, Shale Gas Fracturing Chemicals in India. Mubychem Group has several manufacturing facilities spread across Western India and world wide contacts and toll manufacturers. We are exporting globally to countries like USA, Canada, Europe, UAE, South Africa, Tanzania, Kenya, Egypt, Nigeria, Cameroon, Uganda, Turkey, Mexico, Brazil, Chile, Argentina, Dubai, Korea, Vietnam, Thailand, Malaysia, Indonesia, Australia, China, Germany, France, Italy, Portugal etc.

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Selenious Acid: CAS Number 7783-00-8, Chemical Formula H2SeO3, Molecular Weight 128.97, EC Number 231-974-7, HS Code ---**

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MSDS Sheet of Selenious Acid Manufacturers

Spanish Ácido selenioso Fabricantes

Selenious Acid
USP & Pure Grade Suppliers
Selenious Acid

Selenous acid (or selenious acid) is the chemical compound with the formula H2SeO3. Structurally, it is more accurately described by (HO)2SeO.
The major use is in changing the color of steel, especially the steel in guns & razor blades the so-called "bluing" process which uses selenous acid. Some older were also made of blued steel. It is also used in darkening of copper, brass and bronze, producing a rich dark brown color.

Specifications of Commercial Pure Selenious Acid
CAS Number: 7783-00-8
Molecular formula: H2SeO3
Molecular weight: 128.97
Description: White to off-white hygroscopic crystalline mass.
Residue on ignition: Max. 0.1 %.
Assay: Between 93.0% and 101.0%.

Selenious Acid USP Grade Specifications
H2SeO3 -- 128.97
Selenium dioxide, monohydrated.
Selenious acid [CAS 7783-00-8].

Selenious Acid contains not less than 93.0 percent and not more than 101.0 percent of H2SeO3.

Identification
A: Dissolve about 50 mg in 5 mL of water, add about 100 mg of sodium bicarbonate, and mix: gas bubbles develop.
B: Dissolve about 50 mg in 5 mL of 0.1 N hydrochloric acid, and add about 50 mg of stannous chloride: a curdy tan-orange precipitate is formed.

Tests
Residue on ignition: not more than 1.0 mg, from 10.0 g (0.01%).
Insoluble matter: Dissolve 1 g in 5 mL of water: it dissolves completely and the solution is clear.
Selenate and sulfate: Dissolve about 0.5 g in 10 mL of water, add 0.1 mL of hydrochloric acid and 1 mL of barium chloride, and mix: no turbidity or precipitate is formed in 10 minutes.
Assay: Transfer about 100 mg of Selenious Acid, accurately weighed, to a suitable glass-stoppered flask, and dissolve in 50 mL of water. Add 10 mL of potassium iodide solution (3 in 10) and 5 mL of hydrochloric acid, mix, insert the stopper in the flask, and allow to stand for 10 minutes. Add 50 mL of water and 3 mL of starch, and titrate with 0.1 N sodium thiosulfate until the solution is colorless, then titrate with 0.1 N iodine VS to a blue endpoint. Subtract the volume of 0.1 N iodine from the volume of 0.1 N sodium thiosulfate to obtain the volume of 0.1 N sodium thiosulfate equivalent to selenious acid. Each mL of 0.1 N sodium thiosulfate is equivalent to 3.225 mg of H2SeO3.

For Original Monographs of IP Indian Pharmacopoeia BP British Pharmacopoeia USP US Pharmacopoeia FCC Food Grade product, please check with the respective web-pages or books.

We manufacture and supply Selenium Compounds as under:

Benzeneseleninic Anhydride

Cadmium Selenide

Diphenyl Diselenide

Selenious Acid

Selenium Dioxide

Selenium Metal

Selenium Sulfide

L-Selenomethionine

Sodium Selenate

Sodium Selenite Pentahydrate

Zinc Selenite.

Manufacturers:

MUBY CHEMICALS
Ambernath Mumbai, Ankleshwar Gujarat, India
TEL: (OFFICE) +912223770100, +912223726950
Current Date Time in India GMT+5:30

e-mail: info@mubychem.com

USA, Canada, Mexico and other American
neighbouring buyers may
e-mail: us@mubychem.com
Call toll-free 1-844-682-9243 (1-844-MUBYCHEM)

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Last 27 August, 2022

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Selenious acid SDS, Safety Data Sheet
MSDS Sheet, Material Safety Data Sheet
15-Nov-20

Section 1. Product Information

Product Name & Other Names: Selenious acid or Selenous acid
Chemical Formula: H2SeO3
Molecular Weight: 128.97
CAS No.: 7783-00-8
EINECS EC Number: 231-974-7
Relevant uses and uses advised against (if any): Industrial Manufacturing.
Suppliers: As per letterhead.

Section 2: Hazards Identification

GHS, Globally Harmonized System Classification in accordance with 29 CFR 1910
Classification according to Regulation (EC) No 1272/2008

Acute toxicity, Oral (Category 3), H301
Acute toxicity, Inhalation (Category 3), H331
Specific target organ toxicity - repeated exposure (Category 2), H373
Chronic aquatic toxicity (Category 1), H410

Labelling according GHS & Regulation (EC) No 1272/2008

GHS Label Elements
Aquatic Toxicity
Aquatic Toxicity

GHS Label Elements
Health Hazard
Health Hazard

GHS Label Elements
toxic.png
Toxic

Signal Words: Danger

Hazard statements:
H301 Toxic if swallowed.
H331 Toxic if inhaled.
H373 May cause damage to organs through prolonged or repeated exposure.
H410 Very toxic to aquatic life with long lasting effects.

Precautionary statements:
P260: Do not breathe dust/fume/gas/mist/vapors/spray.
P264: Wash … thoroughly after handling.
P270: Do not eat, drink or smoke when using this product.
P271: Use only outdoors or in a well-ventilated area.
P273: Avoid release to the environment.
P280: Wear protective gloves/protective clothing/eye protection/face protection.
P314: Get medical advice/attention if you feel unwell.
P330: Rinse mouth.
P301+310: IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician.
P304+340: IF INHALED: Remove victim to fresh air and keep at rest in a position comfortable for breathing.
P391: Collect spillage.
P405: Store locked up.
P403+233: Store in a well-ventilated place. Keep container tightly closed.
P501: Dispose of contents/container in accordance with local/regional/national/international regulation.

Classification according to EU Directives 67/548/EEC or 1999/45/EC:
Hazard Symbols:
T = Toxic
N = Dangerous for the environment
Risk Phrases:
R23/25 = Toxic by inhalation and if swallowed.
R48 Danger of serious damage to health by prolonged exposure.
R50 = Very toxic to aquatic organisms.

Section 3: Composition and Information on Ingredients

Product Name & Other Names: Selenious acid or Selenous acid
CAS No.: 7783-00-8
EINECS EC Number: 231-974-7

Section 4. First Aid & Procedure

Always get medical attention after the first aid is over.

Ingestion: Induce vomiting immediately as directed by medical personnel. Never give anything by mouth to an unconscious person. Get medical attention.
Skin:
Immediately flush skin with plenty of water for at least 15 minutes. Remove and wash contaminated clothing and shoes before reuse. Get medical attention if irritation develops.
Eyes:
Immediately flush eyes with plenty of water for 15 minutes, occasionally lifting upper and lower eyelids. Hold eyelids apart during irrigation. Get medical attention.
Inhalation:
Remove person to fresh air. If breathing is difficult, give oxygen. If not breathing administer artificial respiration. Get medical attention.

Section 5. Fire Fighting Measures

Flash Point: N/A
Auto ignition Temperature:
N/A
Fire/Explosion: Not considered to be a fire and explosion hazard.
Extinguishing Medium:
Water spray, alcohol-resistant foam, dry chemical or carbon dioxide.
Fire Fighting Instructions: Use suitable protective equipment for surrounding fire.
Special Information: In the event of a fire, wear full protective clothing and NIOSH-approved self-contained breathing apparatus with full face piece operated in the pressure demand or other positive pressure mode. At high temperatures under fire conditions, it may produce toxic or irritating fumes. Fire-extinguishing work is done from the windward and the suitable fire-extinguishing method according to the surrounding situation is used. Uninvolved persons should evacuate to a safe place.

Section 6. Spills and Disposals

Personal precautions, protective equipment, and emergency procedures: Avoid breathing dust/fumes/gas/mist/vapors/spray. Use individual protective equipment (waterproof boots, suitable protective clothing, safety glasses, etc.). Restrict unprotected personnel from the area. Prevent any contact with hot surfaces. Do not approach facing the wind. Do not touch the spilled material.
Environmental precautions: Do not let the product enter drains, soil, or water sources.
Methods and materials used for containment Cleanup procedures and Storage: Do not inhale vapors, mist, or gas. Avoid dust formation. Contain spilled material. Cover with an inert, non-combustible absorbent material, (e.g. sand, earth, diatomaceous earth, vermiculite). Use a shovel to put the material into a convenient waste disposal container. Finish cleaning by spreading water on the contaminated surface and allow to evacuate as per law.

Section 7. Handling and Storage

Precautions for safe handling: Apply according to good manufacturing and industrial hygiene practices. Avoid prolonged or repeated exposure. Ensure proper ventilation. In case of insufficient ventilation, wear suitable respiratory equipment. Wash thoroughly after handling. Do not drink, eat, or smoke while handling. Avoid contact with skin, eyes, and clothing. Minimize dust generation. Avoid breathing dust/fumes/gas/mist/vapors/spray. Avoid contact with eyes, skin, and clothing. Keep container tightly closed. Avoid ingestion and inhalation. Use individual protective equipment (waterproof boots, suitable protective clothing, safety glasses, etc.). Prevent any contact with hot surfaces.
Conditions for safe storage, including any incompatibilities: Store in cool, dry, and ventilated area away from heat sources and protected from sunlight in tightly closed original container. Keep air contact to a minimum. Store protected from heat, sparks and ignition sources and incompatible materials. Avoid contact with skin and eyes. Avoid inhalation of dust/mist/vapor. Do not store with incompatible materials like strong oxidizing agents, organic materials, powdered metals.

Section 8. Exposure Controls & Personal Protection

Exposure Limits for Selenious acid:
OSHA PEL: 0.2 mg/COM Ceiling for Selenium compounds (as Se).
ACGIH TLV: 0.2 mg/CBM (TWA) Selenium compounds (as Se).
Engineering Controls: Use adequate exhaust ventilation to keep airborne concentrations below the allowable exposure limit.
Ventilation System: A system of local and/or general exhaust is recommended to keep employee exposures as low as possible. Local exhaust ventilation is generally preferred because it can control the emissions of the contaminant at its source, preventing dispersion of it into the general work area.
Personal Respirators (NIOSH Approved): For conditions of use where exposure to dust or mist is apparent and engineering controls are not feasible, a particulate respirator may be worn. For emergencies or instances where the exposure levels are not known, use a full-face positive-pressure, air-supplied respirator.
Skin Protection: Wear protective gloves and clean body-covering clothing.
Eye Protection: Use chemical safety goggles and/or full face shield where dusting or splashing of solutions is possible. Maintain eye wash fountain and quick-drench facilities in work area.
Other Control Measures: Maintain good housekeeping in work area. Dust deposits on floors and other surfaces may pick up moisture and cause the surfaces to become slippery and present safety hazards. Handle in accordance with good industrial hygiene and safety practice. Wash hands after handling.

Section 9. Physical & Chemical Data

Appearance: Selenious acid is solid.
Odor: Not available.
Odor threshold: Not available.
pH: Not available.
Relative density: around 3
Melting Point: 70C
Initial boiling point and boiling range
: Not available.
Flash point: Not available.
Auto-ignition temperature: Not available.
Decomposition temperature: Not available.
Upper/lower flammability or explosive limits: Not available.
Vapor pressure: Not available.
Vapor density: Not available.
Evaporation rate: Not available.
Flammability (solid, gas): Not available.
Partition coefficient: n-octanol/water: Not available.
Solubility: Easily soluble in water, insoluble in ethanol
Viscosity: Not available.
Chemical Formula: H2SeO3
Molecular Weight: 128.97

Section 10. Stability and Reactivity

Chemical Stability: Stable under normal temperatures and pressures.
Incompatibility (Materials to Avoid):
Strong reducing agents, Organic materials, Powdered metals.
Conditions to Avoid: Incompatible materials, exposure to moist air or water, excessive heat.
Hazardous Decomposition Products: selenium Oxide and fumes.
Hazardous Polymerization:
Will not occur.

Section 11. Toxicological Information

Toxicity to Animals: LD50 Intravenous - mouse - 11 mg/kg. LD50 Dermal 4 mg/kg (Rabbit). LD50 (oral, rat) value of 68.1 mg/kg
Carcinogenicity: Not listed as a suspected/confirmed carcinogen by ACGIH, IARC, NTP, SHA.
Teratogenic Effects: Not available.
Mutagenic Effects: Possible for humans. Laboratory experiments have shown mutagenic effects.
Developmental Toxicity: Not available.
Reproductive Effects: No information available.
Specific target organ toxicity: repeated exposure: May cause damage to organs through prolonged or repeated exposure.

Section 12. Ecological Information

Ecotoxicity: Very toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment.
Results of PBT and vPvB Assessment: Not available.
Persistence and Degradability: Soluble in water. Persistence is unlikely.
Mobility: Likely to be mobile due to water solubility.
Bioaccumulation/ Accumulation: No information available.
Results of PBT and vPvB assessment: No data available for assessment.

Section 13. Disposal Suggestions

Dispose of in accordance with all applicable local, state, and federal regulations at an approved waste disposal facility.

Section 14. Transport and Label Information

DOT USA, TDG Canada & ADR/RID Europe:
UN-No UN3283
Proper Shipping Name SELENIUM COMPOUND, N.O.S
Proper technical name: Selenous acid
Hazard Class 6.1
Packing Group III
IMDG/IMO
UN-No UN3283
Proper Shipping Name SELENIUM COMPOUND, N.O.S
Hazard Class 6.1
Packing Group III
IATA:
UN-No UN3283
Proper Shipping Name SELENIUM COMPOUND, N.O.S
Hazard Class 6.1
Packing Group III

Section 15. Regulatory Information

USA:
California Proposition 65
: Not listed.
SARA 311/312: Acute Health Hazard; Chronic Health Hazard. See section 2.

Section 16. Other Information

European Labeling in Accordance with EC Directives:
H301 + H331 = Toxic if swallowed or if inhaled
H373 = May cause damage to organs through prolonged or repeated exposure.
H400 = Very toxic to aquatic life.

Classification according to EU Directives 67/548/EEC or 1999/45/EC:
Hazard Symbols:
N = Dangerous for the environment
T = Toxic
Risk Phrases:
R23/25 = Toxic by inhalation and if swallowed.
R48 Danger of serious damage to health by prolonged exposure.
R50 = Very toxic to aquatic organisms.

Disclaimer:
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Our company provides this MSDS sheet in good faith but makes no representation as to its comprehensiveness or accuracy. This SDS sheet is intended only as a guide to the appropriate precautionary handling of the material by a properly trained person using this product. The above information has been compiled from various sources and has the possibility of discrepancy and being out-dated information. Individuals receiving the information must exercise their independent judgment and do further search in determining its appropriateness for a particular purpose. In no case shall our company be liable to loss or damages by the product user.
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