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Product/Chemical Name:  Sodium Acid Pyrophosphate
Chemical Formula: Na2H2P2O7
CAS Number: 7758-16-9
Other Designations: SAPP; pyrophosphate acid, disodium salt; disodium dihydrogen pyrophosphate 
Emergency Telephone: 1-800-424-9300 (Chemtrec)

 AIRBORNE EXPOSURE LIMITS:

OSHA and ACGIH have not established specific exposure limits for this material. However, OSHA and ACGIH have established limits for particulates not otherwise classified (PNOC) which are the least stringent exposure limits applicable to dusts.
OSHA PEL ACGIH TLV

 15 mg/m3 (total dust) 8-hr TWA 10 mg/m3 (inhalable) 8-hr TWA
5 mg/m3 (respirable) 8-hr TWA 3 mg/m3 (respirable) 8-hr TWA

Potential Health Effects
Primary Entry Routes: Inhalation, eye and skin contact.
Target Organs: 
Acute Effects
EYE CONTACT: This product may cause pain, redness, and tearing. High dust concentrations were reported to cause mild eye irritation.
SKIN CONTACT: This product may cause pain, redness, and swelling. High dust concentrations were reported to cause mild skin irritation.
INHALATION: This product causes coughing, chest pain, runny nose, and burning throat. Workers exposed to dust of this product reported moderate irritation of the nose and throat, with five of the eighteen workers reporting nasal stuffiness and nosebleeds
INGESTION: No more than slightly toxic if swallowed based on toxicity studies. No significant adverse health effects are expected to develop if only small amounts (less than a mouthful) are swallowed. Swallowing large quantities may cause gastrointestinal tract irritation, nausea, vomiting, cramps, and diarrhea.
Carcinogenicity: IARC, NTP, and OSHA do not list Sodium Acid Pyrophosphate as a carcinogen.
Medical Conditions Aggravated by Long-Term Exposure:
Chronic Effects: The dry powder may cause foreign body irritation in some individuals. Prolonged contact with the dry powder may cause drying or chapping of the skin. Workers exposed to dust of this product reported moderate irritation of the nose and throat, with five of the eighteen workers reporting nasal stuffiness and nosebleeds. High dust concentrations were reported to cause mild eye and skin irritation.

Inhalation: Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid if symptoms persist.
Eye Contact: Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid if symptoms persist.
Skin Contact: Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Get medical aid if symptoms persist.
Ingestion: Immediate first aid is not likely to be required. A physician or Poison Control Center can be contacted for advice. Wash heavily contaminated clothing before reuse.
After first aid, get appropriate in-plant, paramedic, or community medical support.
Note to Physicians:  Treat symptomatically and supportively.
Special Precautions/Procedures:

Flash Point: Not combustible.
Autoignition Temperature: Not applicable
LEL: Not applicable
UEL: Not applicable
Flammability Classification: Non-flammable
Extinguishing Media: For small fires, use water spray, dry chemical, carbon dioxide or chemical foam.
Unusual Fire or Explosion Hazards: None known.
Hazardous Combustion Products: During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion.
Fire-Fighting Instructions: Do not release runoff from fire control methods to sewers or waterways.
Fire-Fighting Equipment: Because fire may produce toxic thermal decomposition products, wear a self-contained breathing apparatus (SCBA) with a full facepiece operated in pressure-demand or positive-pressure mode.

Spill /Leak Procedures:
Small Spills: Sweep up, then place into a suitable container for disposal. Avoid generating dusty conditions.
Large Spills
Containment: For large spills, dike far ahead of spill for later disposal. Do not release into sewers or waterways.
Cleanup:
Regulatory Requirements: Follow applicable OSHA regulations (29 CFR 1910.120).

Handling Precautions: Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Use with adequate ventilation. Minimize dust generation and accumulation. Avoid contact with skin and eyes. Keep container tightly closed. Avoid ingestion and inhalation.
Storage Requirements: Store in a cool, dry, well-ventilated area away from incompatible substances.

Engineering Controls: Use adequate ventilation to keep airborne concentrations low.
Ventilation: Provide general or local exhaust ventilation systems to maintain airborne concentrations below OSHA PELs (Sec. 2). Local exhaust ventilation is preferred because it prevents contaminant dispersion into the work area by controlling it at its source.
Administrative Controls:
Respiratory Protection: Seek professional advice prior to respirator selection and use. Follow OSHA respirator regulations (29 CFR 1910.134) and, if necessary, wear a MSHA/NIOSH-approved respirator. Select respirator based on its suitability to provide adequate worker protection for given working conditions, level of airborne contamination, and presence of sufficient oxygen. For emergency or non-routine operations (cleaning spills, reactor vessels, or storage tanks), wear an SCBA. Warning! Air-purifying respirators do not protect workers in oxygen-deficient atmospheres. If respirators are used, OSHA requires a written respiratory protection program that includes at least: medical certification, training, fit-testing, periodic environmental monitoring, maintenance, inspection, cleaning, and convenient, sanitary storage areas.
Protective Clothing/Equipment: Wear chemically protective gloves, boots, aprons, and gauntlets to prevent prolonged or repeated skin contact. Wear protective eyeglasses or chemical safety goggles, per OSHA eye- and face-protection regulations (29 CFR 1910.133). Contact lenses are not eye protective devices. Appropriate eye protection must be worn instead of, or in conjunction with contact lenses.
Safety Stations: Make emergency eyewash stations, safety/quick-drench showers, and washing facilities available in work area.
Contaminated Equipment: Separate contaminated work clothes from street clothes. Launder before reuse. Remove this material from your shoes and clean personal protective equipment.
Comments: Never eat, drink, or smoke in work areas. Practice good personal hygiene after using this material, especially before eating, drinking, smoking, using the toilet, or applying cosmetics.

Stability: Sodium Acid Pyrophosphate is stable at room temperature in closed containers under normal storage and handling conditions.
Polymerization: Hazardous polymerization cannot occur.
Chemical Incompatibilities: Strong mineral acids and oxidizing agents.
Conditions to Avoid: Incompatible materials, dust generation, excess heat.
Hazardous Decomposition Products: Thermal oxidative decomposition of Sodium Acid Pyrophosphate can generate phosphorous compounds.

Toxicity Data:*

* See NIOSH,  RTECS , for additional toxicity data.

Ecotoxicity:  No data available.
Environmental Fate: No data available. 
Environmental Degradation: No data available.

Disposal: Contact your supplier or a licensed contractor for detailed recommendations. Follow applicable Federal, state, and local regulations.
Disposal Regulatory Requirements:
Container Cleaning and Disposal:

DOT Transportation Data (49 CFR 172.101):  Not Regulated.

TSCA Inventory:
Listed as diphosphoric acid, disodium salt

SARA Hazard Notification
Hazard Categories Under Title III Rules (40 CFR 370): immediate
Section 302 Extremely Hazardous Substances: not applicable
Section 313 Toxic Chemical(s): not applicable

CERCLA Reportable Quantity: not applicable

Disclaimer: All information, recommendations and suggestions appearing herein are based upon sources believed to be reliable: However, it is the users responsibility to determine the safety, toxicity and suitability for its own use of this product.  FEDERATED MILLS, INC. DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE USE BY OTHERS OF THIS PRODUCT.