Material Safety Data Sheet
THIS PRODUCT IS A CHEMICAL SUBSTANCE, AND IS INTENDED TO BE USED BY PERSONS
HAVING CHEMICAL KNOWLEDGE AND SKILL, AT THEIR OWN DISCRETION AND RISK.

IDENTITY: WST-5

Section 1. Chemical Identification
Trade Name: WST-5
Manufacturer: Dojindo Laboratories
Address: Kumamoto Techno Research Park, Tabaru 2025-5 Mashiki-machi, Kamimashiki-gun, Kumamoto
861-2202, JAPAN
Telephone: +81-96-286-1515
Data prepared: April 22, 2002

Section 2. Composition/ Information on Ingredients
Chemical Name: 2,2'-Dibenzothiazolyl-5,5'-bis[4-di(2-sulfoethyl)carbamoylphenyl]-3,3'-
(3,3'-dimethoxy-4,4'-biphenylene)ditetrazolium, disodium salt
CAS Registry #: 178925-55-8

Section 3. Health Hazard Data
Route(s) of Entry:
Inhalation? Yes; Skin? Yes; Ingestion? Yes
Health Hazards (Acute and Chronic): May be harmful by inhalation, ingestion or skin absorption.
Causes eye and skin irritation. Material is irritating to mucous membranes and upper respiratory tract.
Signs and Symptoms of Exposure: Not available
Medical Conditions Generally Aggravated by Exposure: Not available

Section 4. First Aid Procedure
In case of contact with eyes, immediately flush eyes with copious amounts of water for at least 15 minutes. In case of
contact, immediately wash skin with soap and copious amounts of water. Assure adequate flushing of the eyes by
separating the eyelids with fingers. If inhaled, remove to fresh air. If not breathing, give artificial respiration. If
breathing is difficult, give oxygen. If ingested, wash out mouth with water. Call physician. Discard contaminated
clothing and shoes.

Section 5. Fire and Explosion Hazard Data
Flash Point (Method Used): Not available
Flammable Limits: Not available
Extinguishing Media: Carbon dioxide, dry chemical powder, foam and water
Special Fire Fighting Procedures: Wear protective clothing, respirator, chemical safety goggles, rubber boots
and heavy rubber gloves.
Unusual Fire and Explosion Hazards: Fire may produce irritating or poisonous gases.

Section 6. Accidental Release Measures
Steps to be Taken in Case Material is Released or Spilled:
Wear self-contained breathing apparatus, rubber boots and heavy rubber gloves. Evacuate the area. Sweep up, place in a
bag and hold for waste disposal. Ventilate the area and wash the spill site after material pickup is complete. Avoid
raising dust.

Section 7. Handling and Storage
Wear appropriate NIOSH/ MSHA-approved respirator, chemical-safety goggles, chemical-resistant gloves, other
protective clothing. Mechanical exhaust required. Use only in a chemical fume hood. Safety shower and eye bath. Face
shield. Do not breathe the dust. Do not get in eyes, on skin or on clothing. Wash thoroughly after handling. Irritant.
Harmful solid. Avoid all contact. Avoid prolonged or repeated exposure.
 Keep tightly closed. Store in a cool (0-5oC), dark and dry place.
Other Precautions:

Section 8. Exposure Controls/ Personal Protection
Respiratory Protection (Specify Type): Necessary
Ventilation, Local Exhaust: Chemical fume hood
Mechanical (General): Necessary
Protective Gloves: Chemical-resistant gloves
Eye Protection: Chemical-safety goggles
Other Protective Clothing or Equipment: Necessary
Work/ Hygienic Practices: Wash thoroughly after handling. Access to safety shower and eye-wash required.
Do not permit eating, drinking or smoking near the material.

Section 9. Physical/ Chemical Characteristics
Melting Point: Not available
Boiling Point: Not available
Specific Gravity (water=1): Not available
Vapor Pressure: Not available
Vapor Density (air=1): Not available
Evaporation Rate (butyl acetate=1): Not available
Solubility in Phosphate buffer (pH=8.0): Soluble
Appearance and Odor: Brown powder

Section 10. Reactivity Data
Stability: Stable
Conditions to Avoid: Heat, sunlight and high temperature
Incompatibility (Materials to Avoid): Strong oxidizing agents, strong acids and strong bases.
Hazardous Decomposition or Byproducts: When decomposed, it may emit toxic fumes of carbon monoxide, carbon
dioxide, nitrogen oxides and sulfur oxides.
Hazardous Polymerization: Will not occur

Section 11. Toxicological Information
Acute Effects: Data not available
Chronic Effects: Data not available
Carcinogenicity: Data not available
RTECS #: Not listed

Section 12. Ecological Information
Data not available

Section 13. Disposal Consideration
Dissolve or mix the material with a combustible solvent and burn in a chemical incinerator equipped with an after
burner and scrubber.

Section 14. Transport Information
Not regulated

Section 15. Regulatory Information
Not applicable

Section 16. Other Information

THE ABOVE INFORMATION IS BELIEVED TO BE CORRECT BUT DOES NOT PURPORT TO BE
ALLINCLUSIVE AND SHALL BE USED ONLY AS A GUIDE. DOJINDO LABORATORIES SHALL NOT
BE HELD LIABLE FOR ANYDAMAGE RESULTING FROM HANDING OR FROM CONTACT WITH THE
ABOVE MATERIAL.


WST-5