Section 1:  CHEMICAL PRODUCT and COMPANY IDENTIFICATION

Chemical Family

Inorganic salt solution

Chemical / Synonyms

Thio-Sul, 12-0-0-26S, Ammonium Hypo                                    

P.O. Box 10                                                                                           111 N. 1ST Street                                                                        Texline, TX 79087

Ammonium Thiosulfate (NH4)2S2O3

Water

(Typical)

60

40

orl-rat LD50: 2850 mg/kg*

 * NIOSH RTECS (1987 Supplement)

Section 3:  HEALTH and HAZARDS INFORMATION

NFPA:

Health                   Flammability -  0               Reactivity – 1

Eye

Contact with the eyes by product mist or solution may cause irritation or a burning sensation.

Skin Contact

Prolonged or repeated contact with product mist or solution may cause skin irritation.

Ingestion

Ingestion of product solution may cause irritation of the gastrointestinal tract to include nausea, vomiting and diarrhea.  Ammonium thiosulfate is considered to have a low toxicity to humans.

Inhalation

Inhalation of product mist may cause irritation of the nose, throat and respiratory tract.

Chronic Effects / Carcinogenicity

Not listed as a carcinogen by NTP, IARC or OSHA.

Section 5:  FIRST AID MEASURES                             

Eyes

Immediately flush with large quantities of water for 15 minutes.  Hold eyelids apart during irrigation to insure thorough flushing of the entire area of the eye and lids with water.  Obtain medical attention if irritation occurs.

Immediately flush with large quantities of water.  Remove contaminated clothing under a safety shower.  Obtain medical attention if irritation occurs.

Ingestion

If victim is conscious, give 2 to 4 glasses of water and induce vomiting by touching finger to back of throat. Obtain medical attention.

Inhalation

Remove victim from contaminated atmosphere.  If breathing is labored, administer oxygen.  If breathing is ceased, clear airway and start mouth resuscitation.  If heart has stopped beating, external heart massage should be applied. Obtain medical attention.

Section 6:  FIRE FIGHTING MEASURES

Flammable Properties

Flash Point:  Not flammable                        Method Used: N/A

Flammable Limits

LFL: N/A                                                      UFL: N/A

Extinguishing Media

As appropriate for combustibles involved in fire.

Keep containers/storage vessels in fire area cooled with water spray. When heated, solutions of ammonium thiosulfate will evolve ammonia gas.  NIOSH proved self-contained breathing apparatus should be available to fire fighters working in an area where containers of this product are stored.

Section 7:  ENVIRONMENTAL PROTECTION

Small Release

Confine and absorb small releases on sand earth or other inert absorbent.  Dispose of in accordance with all governmental regulations.

Large Releases

Confine area to qualified personnel.  Shut off release if safe to do so.  Dike spill area to prevent runoff into sewers, drain or surface waterways (potential aquatic toxicity).  Recover as much of the solution as possible.  Flush residue to soil with large quantity of water, if permitted by applicable disposal regulations.

Section 8:  HANDLING and STORAGE

None generally required.  If conditions exist where mist may be generated, a  mist respirator should be used.

Skin Protection

Neoprene rubber gloves and apron should be worn to prevent repeated or prolonged contact with the liquid.  Wash contaminated clothing prior to reuse.

Eye Protection

Chemical goggles and a full face shield.  DO NOT WEAR CONTACT LENSES.

Engineering Controls

Use adequate exhaust ventilation to prevent inhalation of product vapors.

Appearance

Colorless to pale yellow to green solution.

Odor

May have a slight ammonia and/or organic odor.

Boiling Point

210 F (98.9 C) – 220 F (104.4 C)

Vapor Density

Not determined

Solubility in Water

Complete

Specific Gravity

1.32 – 1.35 (11.0 – 11.2 lbs/gal)

pH

7.0 – 8.5

Volatile

Not applicable

Section 11:  STABILITY and REACTIVITY

Stability

This is a stable material

Hazardous Polymerization

Will not occur

Hazardous Decomposition Products

Heating this product will evolve ammonia.  Heating to dryness will cause the production of ammonia, ammonium sulfate, sulfur and oxides of sulfur.  Ammonia (16-25%) may form flammable mixtures with air.

Conditions and Materials to Avoid

Contact with strong oxidizers such as nitrates, nitrites or chlorates may cause explosions or the release of ammonia, hydrogen sulfide or sulfur oxides.  Contact with strong acids will cause the release of sulfur dioxide, a severe respiratory hazard.  Contact with strong Alkalies will accelerate the evolution of ammonia. Avoid storage near oxidizers, strong acids or strong alkalies.

Ammonium thiosulfate solution is not compatible with copper, zinc, or their alloys (i.e. bronze, brass, galvanized metals, etc.).  These materials of construction should not be used in handling systems or storage containers for this product. 

Section 12:  TRANSPORT INFORMATION

DOT Shipping Name

RQ ORM-E, NA 9188, Ammonium Thiosulfate solution

DOT Placard

NA

DOT Label(S)

NA

RQ (Reportable Quantity)

5,000 lbs

Section 13:  OTHER REGULATORY CONTROLS

Not Applicable

The information contained herein is based on data which is believed to be accurate.  However, no warranty of merchantability, fitness for use or any other warranties expressed or is to be implied concerning the accuracy of these data, the result to be obtained from the use of the materials, or the hazards connected with such use. This information is furnished on the condition that the person receiving it shall make his own determination as to the suitability of the material for his particular purpose and on the condition that he assume the risk of his use thereof.