MSDS Name:

Sodium Thiosulfate, Anhydrous

Synonyms:

Sodium Hyposulfite; Thosulfuric Acid, Disodium Salt

Chemical Family

Inorganic Sodium Compounds

Formula

Na₂S₂O₃

Formula Wt.

158.11

CAS No.

7772-98-7

NIOSH/RTECS No.

XN6476000

Product Use

Laboratory Reagent

Product Codes

3954

Company Identification:

Nalge Nunc International
Rochester, NY 14625

Company Phone Number:

(800) 625-4327

Emergency Phone Number:

(908) 859-2151

CHEMTREC Phone Number, US:

(800) 424-9300

CHEMTREC Phone Number, Europe:

(202) 483-7616

SAF-T-DATA™ System:

Health: 1 (slight)
Flammability: 0 (none)
Reactivity: 1 (slight)
Contact: 1 (slight)

Laboratory Protective Equipment:

Goggles, Lab Coat

US Precautionary Labeling

CAUTION! MAY CAUSE IRRITATION. MAY BE HARMFUL IF SWALLOWED.
During use avoid contact with eyes, skin, clothing. Wash thoroughly after handling. When not in use keep in tightly closed container.

International Labeling

Avoid contact with eyes. After contact with skin, wash immediately with plenty of water. Keep container tightly closed.

SAF-T-DATA™ Storage Color Code:

Orange (general storage)

CAS#             Chemical Name:           Percent       EINECS        ACGIH/TLV
7772-98-7      Sodium Thiosulfate         98-100%        N/E             N/E
			

Boiling Point:

N/A

Vapor Pressure (mm Hg):

N/A

Melting Point (at 760 mmHg):

N/A

Vapor Density (air=1):

N/A

Specific Gravity/Density (H2O=1):

1.67

Evaporation Rate:

N/A

Solubility(H2O):

Appreciable (>10%)

% Volatiles by Volume (21° C):

0

pH:

N/A

Physical State:

solid

Odor:

Odorless

Odor Threshold (ppm):

N/A

Appearance:

white crystals

Coefficient Water/Oil Distribution:

N/A

Extinguishing Media:

Use extinguishing media appropriate for surrounding fire.

Autoignition Temperature:

N/A

Flash Point (Closed Cup):

N/A

Flammable Limits:

Lower: N/A Upper: N/A

Unusual Fire & Explosion Hazards:

None Identified.

Toxic Gasses Produced:

sulfur dioxide/dd>

Explosion Data - Sensitivity to Mechanical Impact:

None Identified.

Explosion Data - Sensitivity to Static Discharge:

None Identified.

Special Fire Fighting Procedures:

Firefighters should wear proper protective equipment and self-contained breathing apparatus with full facepiece operated in positive pressure mode. Move containers form fire area if it can be done without risk. Use water to keep fire-exposed containers cool.

Threshold Limit Value (TLV/TWA):

Not Established

Short-Term Exposure Limit (STEL):

Not Established

Permissible Exposure Limit (PEL):

Not Established

Toxicity of Components:

Intraperitoneal Mouse LD50 for Sodium Thiosulfate: 5600 mg/kg
Carcinogenicity: NTP: No
IARC: No
Z List: No
OSHA Reg: No

Carcinogenicity:

None identified

Reproductive Effects:

None identified

Effects of Overexposure:

Inhalation: Irritation of upper respiratory tract
Skin Contact: Irritation
Eye Contact: Irritation
Skin Absorption: None identified
Ingestion: Gastrointestinal irritation
Chronic Effects: None identified

Target Organs:

None identified

Medical Conditions Generally Aggravated by Exposure:

None identified

Primary Routes of Entry:

Inhalation, ingestion, skin contact, eye contact

Emergency and First Aid Procedures:

Ingestion:
If swallowed and the person is conscious, immediately give large amounts of water. Then induce vomiting.

Inhalation:
If a person breathes in large amounts, move the exposed person to fresh air.

Skin Contact:
In case of contact, immediately wash skin with plenty of soap and water for at least 15 min.

Eye Contact:
In case of eye contact, immediately flush with plenty of water for at least 15 minutes.

SARA/Title III Hazard Categories and Lists

Acute:      Chronic:      Flammability:        Pressure:        Reactivity:
  No          No               No                 No                 No

Extremely Hazardous Substance:  No

CERCLA Hazardous Substance:  No

SARA 313 Toxic Chemicals:  No

TSCA Inventory:  Yes

			 

Chemical Stability:

Stable.

Conditions to Avoid:

Heat.

Incompatibilities with Other Materials

Strong acids, iodine, mercury, strong oxidizing agents

Hazardous Decomposition Products

Oxides of sulfur

Hazardous Polymerization

Will not occur.

Steps to be Taken in the Event of a Spill or Discharge:

Wear suitable protective clothing. Carefully sweep up and remove.

Disposal Procedure:

Dispose in accordance with all applicable federal, state, and local environmental regulations.

Ventilation:

Use adequate general or local exhaust ventilation to keep fume or dust levels as low as possible.

SAF-T-DATA™ Storage Color Code:

Orange (general storage)

Storage Requirements:

Keep container tightly closed. Suitable for any general chemical storage area. Isolate from incompatible materials.

Domestic (D.O.T.):

Proper Shipping Name: Chemicals, n.o.s. (Non-regulated)
Reportable Quantity: 5000 lbs.

International (I.M.O.)

Proper Shipping Name: Chemicals, n.o.s. (Non-regulated)
Marine Pollutants: No

Air (I.C.A.O.)

Proper Shipping Name: Chemicals, n.o.s. (Non-regulated)
US Customs Harmonization Number: 28323000004

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