Thiourea Peroxide
1. Chemical Product and Supplier Identification
Product Name
Thiourea Dioxide
Synonyms
Formamidine sulfinic acid, FAS, TDO
Manufacturer
Shangyu Jiehua Chemical Co., Ltd.
Hangzhou Gulf Fine Chemical Zone, Shangyu, Zhejiang 312369, China
Tel: +86 575 2129111 Fax: +86 575 2129555
Emergency Call: +86 575 2019080
MSDS Number
JHTDO-01-01
Effective Date
January 1, 2003
2. Composition/Information on Ingredients
Ingredients Chemical Formula CAS No. Percentage
Thiourea Dioxide CH4N2O2S 1758-73-2 Min.99.0
3. Hazards Identification
Potential Health Effects
Inhalation鈥︹?︹?︹??.鈥?. Irritating to the respiratory tract. Can produce delayed pulmonary
edema.
Eye contact鈥︹?︹?︹??... May cause irritation to the eyes; May cause chemical
conjunctivitis.
Skin contact鈥︹?︹??.鈥?. May cause skin irritation.
Ingestion鈥︹?︹?︹?︹??... Irritation of the mouth and throat with nausea and vomiting.
4. First-aid Measures
Remove affected person to fresh air. Seek medical attention if
Inhalation鈥︹?︹?︹?︹??..
effects persist.
Flush eyes with running water for at least 15 minutes with eyelids
Eye contact鈥︹?︹?︹??...
held open. Seek specialist advice.
Skin contact鈥︹?︹?︹??.. Wash affected skin with soap and mild detergent and large
amounts of water.
Ingestion鈥︹?︹?︹?︹??... If the person is conscious and not convulsing, give 2-4 cupfuls of
water to dilute the chemical and seek medical attention
immediately. Do not inducing vomiting.
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5. Fire Fighting Measure
Flash Point
Not applicable
Flammability
Not applicable
Ignition Temperature
Not applicable
Danger of Explosion
Non-explosive
Extinguishing Media
Water
Fire Hazards
Not combustible. If involved in a fire, can decompose generating sulphur dioxide, ammonia,
and sulfinic acid. Incompatible with oxidizing agents, water and heavy metals. Material is
shock sensitive and potentially explosive. Hazardous decomposition products include carbon
dioxide and probably carbon monoxide. Oxides of nitrogen and sulphur may also be present.
Hazardous polymerization will not occur.
Fire-Fighting Measures
Evacuate all non-essential personnel
Wear protective clothing and self-contained breathing apparatus
Remain upwind of fire to avoid hazardous vapors and decomposition products
Use water spray to cool fire-exposed containers
6. Accidental Release Measures
Spill Clean-up Procedures
Eliminate all sources of ignition. Evacuate unprotected personnel from equipment
recommendations found in Section 8. Never exceed any occupational exposure limit.
Shovel or sweep material into plastic bags or vented containers for disposal. Do not return
spilled or contaminated material to inventory.
Flush remaining area with water to remove trace residue and dispose of properly. Avoid
direct discharge to sewers and surface waters. Notify authorities if entry occurs.
Do not touch or walk through spilled material. Keep away from combustibles (wood, paper,
oils, etc.). Do not return any product to container because of the risk of contamination.
7. Handling and Storage
Storage
Store in a cool (below 30 掳C ), dry, well ventilated area away from all source of ignition and
out of direct sunlight.
Keep away from incompatible materials. Keep containers tightly closed. Do not store in
unlabeled or mislabeled containers. Never return unused product to storage container.
Protect from moisture. Do not store near combustible materials. Keep containers well sealed,
seal only with original vent cap. Ensure pressure relief and adequate ventilation.
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Store separately from organics and reducing materials. Avoid contamination which may lead
to decomposition.
Handling
Avoid contact with eyes, skin, and clothing. Use with adequate ventilation.
Do not swallow. Avoid breathing vapors, mists, or dust. Do not eat, drink, or smoke in work
area.
Prevent contact with combustible or organic materials.
Label containers and keep them tightly closed when not in use.
Wash thoroughly after handling.
8. Exposure Controls/Personal Protection
Engineering Controls
General room ventilation is required. Local exhaust ventilation, process enclosures or other
engineers controls may be needed to maintain airborne levels below recommended exposure
limits. Avoid creating dust or mist. Maintain adequate ventilation. Do not use in closed or
confined spaces. Keep levels below exposure limits. To determine exposure levels,
monitoring should be performed regularly.
Respiratory Protection
For many conditions, no respiratory protection may be needed; however, in dusty or
unknown atmospheres or when exposures exceed limit values, wear a NIOSH approved
respirator.
Eye/Face Protection
Wear chemical safety goggles and a full face shield while handling this product.
Skin Protection
Prevent contact with this product. Wear gloves and protective clothing depending on
condition of use.
Other Protective Equipment
Eye-wash station
Safety shower
Impervious clothing
Rubber boots
General Hygiene Considerations
Wash with soap and water before meal times and at the end of each work shift. Good
manufacturing practices require gross amounts of any chemical be removed from skin as
soon as practical, especially before eating or smoking.
9. Physical and Chemical Properties
Appearance: White crystalline powder
Odor: None
Solubility: 30g/L @ 20掳C
123 掳C
Decomposition Temperature:
3
10. Stability and Reactivity
Stability
Stable at room temperature in closed containers under normal storage and handling
conditions.
Conditions to Avoid
Water
Excessive heat
Strong alkalies
Strong oxidizing agents
Hazardous Decomposition Products
Ammonia, Sulfur dioxide
11. Toxicological Information
No specific data
12. Ecological Information
No specific data
13. Disposal Considerations
Waste Treatment
Dispose of in an approved waste facility operated by an authorized contractor in compliance
with local regulations.
Package Treatment
The empty and clean containers are to be recycled or disposed of in conformity with local
regulations.
14. Transport Information
Proper Shipping Name: Thiourea Dioxide
UN Number: UN3341
Hazard Class: 4.2
Labels: 4.2 (Flammable Solid)
Packing Group: III
15. Regulatory Information
SARA Section鈥︹?︹?︹?︹?︹??.鈥︹??... Yes
SARA (313) Chemicals鈥︹?︹?︹?︹??. No
EPA TSCA Inventory鈥︹?︹?︹?︹?︹??. No
Canadian WHMIS Classification鈥?.. C, D2B
Canadian DSL鈥︹?︹?︹?︹?︹?︹?︹??... Appears
EINECS Inventory鈥︹?︹?︹?︹?︹?︹??. Appears
16. Other Information
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Disclaimer
The data in this Material Safety Data Sheet is believed to be correct. However, since
conditions of use are outside our control it should not taken as a warranty of representation
for which Shangyu Jiehua Chemical Co., Ltd. assumes legal responsibility. This information
is provided solely for your consideration, investigation, and verification.
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