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Chemical Datasheet

SODIUM PHOSPHATE, TRIBASIC

 8 - Corrosive

Chemical Identifiers

CAS Number UN/NA Number DOT Hazard Label USCG CHRIS Code
  • 10101-89-0
  • 7601-54-9
  • 10361-89-4
  • 7758-29-4
  • 7785-84-4
  • 10124-56-8
  • 3262
  • Corrosive
  • SPH
NIOSH Pocket Guide International Chem Safety Card
none
  • PENTASODIUM TRIPHOSPHATE
  • TRISODIUM PHOSPHATE (ANHYDROUS)
NFPA 704
data unavailable
General Description
A colorless to white crystalline solid. Noncombustible.

Hazards

Reactivity Alerts
none
Air & Water Reactions
Water soluble.
Fire Hazard
Behavior in Fire: At fire temperature decomposes to emit highly toxic and irritating phosphorus oxides. (USCG, 1999)
Health Hazard
INHALATION: Will produce local irritation in the respiratory tract. A burning sensation in the nose and throat, as well as coughing (and in high concentrations, choking) may be noted. May cause lung irritation. EYES: Immediate and severe pain followed by conjuctival edema and corneal clouding. Cataracts may form. SKIN: Immediate local reactions, including reddening, itching and irritation, followed by loss of surface layers of the skin. INGESTION: Severe tissue damage to all portions of the gastrointestinal tract. Symptoms include pain and burning wherever contact is made. Nausea, vomiting, cramps, and diarrhea may occur. Tissue corrosion and ulceration may result if untreated. (USCG, 1999)
Reactivity Profile
SODIUM PHOSPHATE, TRIBASIC corrodes aluminum and zinc [Handling 365betÓéÀÖ Safely 1980 p. 947]. Reacts when heated above about 84°C with aqueous solutions of reducing sugars other than sucrose, to evolve toxic levels of carbon monoxide [Bretherick, 5th Ed., 1995].
Belongs to the Following Reactive Group(s)
Potentially Incompatible Absorbents

No information available.

Response Recommendations

Isolation and Evacuation
Excerpt from ERG Guide 154 [Substances - Toxic and/or Corrosive (Non-Combustible)]:

IMMEDIATE PRECAUTIONARY MEASURE: Isolate spill or leak area in all directions for at least 50 meters (150 feet) for liquids and at least 25 meters (75 feet) for solids.

SPILL: Increase the immediate precautionary measure distance, in the downwind direction, as necessary.

FIRE: If tank, rail tank car or highway tank is involved in a fire, ISOLATE for 800 meters (1/2 mile) in all directions; also, consider initial evacuation for 800 meters (1/2 mile) in all directions. (ERG, 2024)
Firefighting
Excerpt from ERG Guide 154 [Substances - Toxic and/or Corrosive (Non-Combustible)]:

SMALL FIRE: Dry chemical, CO2 or water spray.

LARGE FIRE: Dry chemical, CO2, alcohol-resistant foam or water spray. If it can be done safely, move undamaged containers away from the area around the fire. Dike runoff from fire control for later disposal.

FIRE INVOLVING TANKS, RAIL TANK CARS OR HIGHWAY TANKS: Fight fire from maximum distance or use unmanned master stream devices or monitor nozzles. Do not get water inside containers. Cool containers with flooding quantities of water until well after fire is out. Withdraw immediately in case of rising sound from venting safety devices or discoloration of tank. ALWAYS stay away from tanks in direct contact with flames. (ERG, 2024)
Non-Fire Response
Excerpt from ERG Guide 154 [Substances - Toxic and/or Corrosive (Non-Combustible)]:

ELIMINATE all ignition sources (no smoking, flares, sparks or flames) from immediate area. Do not touch damaged containers or spilled material unless wearing appropriate protective clothing. Stop leak if you can do it without risk. Prevent entry into waterways, sewers, basements or confined areas. Absorb or cover with dry earth, sand or other non-combustible material and transfer to containers. DO NOT GET WATER INSIDE CONTAINERS. (ERG, 2024)
Protective Clothing
Rubber gloves and boots, safety goggles or face mask, hooded suit, and respirator with approved canister, or a self-contained breathing apparatus. (USCG, 1999)
DuPont Tychem® Suit Fabrics
No information available.
First Aid
Get medical aid.

INHALATION: Remove from exposure. If needed, give artificial respiration.

EYES: Wash with running water for 15 min. Continue irrigation for additional 15 min. if physician is (USCG, 1999)

Physical Properties

Chemical Formula:
  • H3O4P.12H2O.3Na
  • H3O4P.3Na
  • H3O4P.10H2O.3Na
  • H5O10P3.5Na
  • H3O9P3.3Na
Flash Point: data unavailable
Lower Explosive Limit (LEL): data unavailable
Upper Explosive Limit (UEL): data unavailable
Autoignition Temperature: data unavailable
Melting Point: 170.06°F (USCG, 1999)
Vapor Pressure: data unavailable
Vapor Density (Relative to Air): data unavailable
Specific Gravity: 1.62 at 68°F (Hydrate) 2.52 anhydrous (USCG, 1999) - Denser than water; will sink
Boiling Point: The hydrate loses 11 moles of water at 212°F. (USCG, 1999)
Molecular Weight: 163.95 (anhydrous); 380.16 (Hydrate, 12H 2 O) (USCG, 1999)
Water Solubility: data unavailable
Ionization Energy/Potential: data unavailable
IDLH: data unavailable

AEGLs (Acute Exposure Guideline Levels)

No AEGL information available.

ERPGs (Emergency Response Planning Guidelines)

No ERPG information available.

PACs (Protective Action Criteria)

Chemical PAC-1 PAC-2 PAC-3
Sodium tripolyphosphate (7758-29-4) 9.4 mg/m3 100 mg/m3 620 mg/m3
(DOE, 2024)

Regulatory Information

EPA Consolidated List of Lists

Regulatory Name CAS Number/
313 Category Code		 EPCRA 302
EHS TPQ		 EPCRA 304
EHS RQ		 CERCLA RQ EPCRA 313
TRI		 RCRA
Code		 CAA 112(r)
RMP TQ
Sodium phosphate, tribasic 10101-89-0 5000 pounds
Sodium phosphate, tribasic 10361-89-4 5000 pounds
Sodium phosphate, tribasic 7601-54-9 5000 pounds

(EPA List of Lists, 2024)

CISA Chemical Facility Anti-Terrorism Standards (CFATS)

No regulatory information available.

OSHA Process Safety Management (PSM) Standard List

No regulatory information available.

Alternate Chemical Names