Product ID:DITHIVER METALS REAGENT, 12616
MSDS Date:01/18/1995
FSC:6550
NIIN:01-346-7676
MSDS Number: BXHDC

HACH CO

AMES, IA 50010
US

Emergency Phone: 303-623-5716

Info Phone: 800-227-4224

Cage: 4T252

HACH COMPANY

907 AMES, IA 50010 US

Telephone: 800-227-4224

Cage: 4T252

PYROSULFUROS ACID, DISODUM SALT; (SODIUM METABISULFITE)

CAS: 7681-57-4

RTECS: UX8225000

Fraction By Weight: <100%

OSHA PEL 5 MG/M3

ACGIH TLV: 5 MG/M3; 9495

OTHER COMPONENT (TYPE NOT SPECIFIED)

Fraction By Weight: <1%

LD50 LC50 Mixture:NONE SPECIFIED BY MANUFACTURER.
Routes of Entry: Inhalation:YES Skin:NO Ingestion:YES
Reports of Carcinogenicity:NTP:NO IARC:NO OSHA:NO
Health Hazards Acute and Chronic:ACUTE:MAY BE IRRITATING TO EYES, SKIN
AND RESPIRATORY TRACT. INGESTION MAY CAUSE STOMACH IRRITATION,
DIARRHEA, CIRCULATORY DISTURBANCES, AND CENTERAL NERVOUS SYSTEM
DEPRESSION. MAY CAUSE ALLERGIC RESP IRATORY REACTION IF SWALLOWED
OR INHALED. MOD TOXIC. CHRONIC:NOT DETERMINED. SPECIAL
NOTE:SULFITES ARE (EFTS OF OVEREXP)
Explanation of Carcinogenicity:NOT RELEVANT.
Effects of Overexposure:HLTH HAZ:STRONG SENSITIZERS. INHAL/INGEST MAY
CAUSE ALLERGIC RESP REACTIONS IN ASTHMATICS. PERSONS W/RESP
CONDITIONS SHOULD TAKE SPECIAL CARE WHEN WORKING W/PRODS THAT
CONTAIN SULFITES.
Medical Cond Aggravated by Exposure:RESPIRATORY CONDITIONS SUCH AS
ASTHMA.

First Aid:EYE AND SKIN CONTACT: IMMEDIATELY FLUSH EYES WITH WATER FOR
AT LEAST 15 MINUTES. CALL PHYSICIAN. WASH SKIN WITH SOAP AND PLENTY
OF WATER. INGESTION: DO NOT INDUCE VOMITING. GIVE 1-2 GLASSES OF
WATER. CALL A PHYSICIAN IMMEDIATELY. NEVER GIVE ANYTHING BY MOUTH
TO AN UNCONSCIOUS PERSON. INHALATION: REMOVE TO FRESH AIR. GIVE
ARTIFICIAL RESPIRATION IF NECESSARY. CALL PHYSICIAN.

Extinguishing Media:WATER, CARBON DIOXIDE, OR DRY CHEMICAL.
Fire Fighting Procedures:USE NIOSH/MSHA APPROVED SCBA AND FULL
PROTECTIVE EQUIPMENT .
Unusual Fire/Explosion Hazard:MAY REACT VIOLENTLY WITH OXIDIZERS OR
ACIDS; MAY EMIT TOXIC FUMES IN FIRE.

Spill Release Procedures:SCOOP SPILLED MATERIAL INTO A BEAKER AND
DISSOLVE WITH WATER. NEUTRALIZE TO A PH BETWEEN 6 AND 9 WITH AN
ALKALI SUCH AS SODA ASH. FLUSH NEUTRALIZED WASTE TO THE DRAIN WITH
AN EXCESS OF WATER.
Neutralizing Agent:NEUTRALIZE TO A PH BETWEEN 6 AND 9 WITH AN ALKAIL
SUCH AS SODA ASH.

Handling and Storage Precautions:STORE TIGHTLY CLOSED IN A COOL, DRY
PLACE.
Other Precautions:AVOID CONTACT WITH EYES, SKIN AND CLOTHING. DO NOT
BREATHE DUST.

Respiratory Protection:NIOSH/MSHA APPROVED RESPIRATOR APPROPRIATE FOR
EXPOSURE OF CONCERN .
Ventilation:ADEQUATE VENTILATION.
Protective Gloves:DISPOSABLE LATEX GLOVES.
Eye Protection:ANSI APPRVD CHEM WORKERS GOGGLES .
Other Protective Equipment:EYE WASH FOUNTAIN & DELUGE SHOWER WHICH MEET
ANSI DESIGN CRITERIA . LAB COAT.
Work Hygienic Practices:WASH THOROUGHLY AFTER HANDLING.
Supplemental Safety and Health
PH: 5% SOLN = 4.2

Melt/Freeze Pt:M.P/F.P Text:338F,170C
Spec Gravity:2.52
pH:SUPDAT
Solubility in Water:VERY SOLUBLE
Appearance and Odor:FINE GRAY POWDER. ODOR OF SO2

Stability Indicator/Materials to Avoid:YES
OXIDIZERS, ALUMINUM POWDER, ACIDS.
Stability Condition to Avoid:EXPOSURE TO MOISTURE, OXIDIZERS, ALUMINUM
POWDER OR ACIDS. PROTECT FROM UNNECESSARY HEAT AND LIGHT AT ALL
TIMES.
Hazardous Decomposition Products:MAY EMIT TOXIC FUMES OF SODIUM OXIDE
AND SULFUR OXIDES IN FIRE.

Waste Disposal Methods:DISPOSAL MUST BE I/A/W FEDERAL, STATE & LOCAL
REGULATIONS.

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document should seek competent professional advice to verify and
assume responsibility for the suitability of this information to their
particular situation.