7/24/2019 Phosphinosuccinic Oligomer (PSO)
1/3
Global Product Strategy
Product Stewardship Summary
Phosphinosuccinic Oligomer (PSO)
Chemical Identity and Synonyms Phosphinosuccinic Oligomer
PSO
The chemical identity of this material is considered
proprietaryinformation
Physical Chemical Properties
Clear, light yellow liquid
Slight acidic odor Miscible in water
pH 3.1
Vapor pressure 15.6 mm Hg @ 100o
F/20o
C
Nalco Products 3D TRASAR 3DT177, 3DT179, 3DT180, (This list only
represents the
products with the high sales volumes that contain this specific
material)
Products supplied in non-returnable containers and
PORTA-FEEDS(automates application of the product).
Product Uses Provides cathodic (pitting) corrosion inhibition by
forming a protective
film. Replaces pyrophosphate, inorganic polyphosphate, zinc,
molybdate
in conventional applications. Offers superior performance
overalternatives and is more environmentally friendly by replacing
zinc and
molybdate and by reducing the level of total phosphate in the
system.
Inhibits calcium carbonate scale formation
Used in a variety of cooling water applications in a variety of
industriesand institutions
Chemical Related Health Information
Based on animal studies, PSO is not expected to be harmful if
swallowedor absorbed through the skin.
Repeated ingestion of the substance by animals showed low
toxicity.
The substance is not irritating to the eyes or skin.
The substance does not cause an allergic reaction in the
skin.
PSO is not expected to cause damage to genetic material (DNA
orchromosomes).
7/24/2019 Phosphinosuccinic Oligomer (PSO)
2/3
Revision Date 5/4/2009 Page 2 of 3
Based on models used by the EPA, the substance is not expected
to becarcinogenic.
Chemical Related Environmental Information
Based on environmental toxicity studies, PSO is not harmful to
fish,aquatic invertebrates or water plants.
The substance is not expected to bioaccumulate.
Although this material will degrade in the environment, the rate
ofdegradation is not expected to be rapid.
Chemical Exposure Potential
Engineering controls are in place at Nalco facilities to reduce
exposures ofthis material to employees, stakeholders, and the
environment.
The material is not released to the air.
The packaged products are warehoused and any spills in the
warehouse
that are not immediately contained, naturally drain to our
process waterwaste treatment. The spilled material is then
segregated to different tanks
for disposal or treatment, depending on the severity of the
spill. Alltreated wastewater is monitored and analyzed continually
for compliance
with state and local regulation.
Nalco uses this material in products intended for industrial
applications.Potential exposure to Nalco products is limited to
those individuals
working at the customers facility or site.
Although the hazards of this substance are low, it is good
industrialpractice to minimize exposure to any chemical. Use of
gloves and eye
protection (safety glasses) is recommended.
Nalco recommends feeding the product into the cooling water
system withan automatic closed feed. This optimizes product
performance and
reduces potential exposure to workers at these facilities.
This substance is not used in consumer applications and exposure
to thegeneral public is not expected during anticipated industrial
use of this
substance.
Chemical Risk Mitigation
Risk is measured as a function of hazard and exposure. This
material haslow hazards for humans and the environmental.
Under normal conditions of anticipated use and when used
withappropriate handling procedures and PPE, the overall potential
risk of thismaterial to human health and the environment is
low.
As with all chemicals, care must be taken to prevent its release
to theenvironment. In the event of a chemical release or spill
Nalco hasprocedures in place that will reduce the potential human
and/or
environmental exposure through containment and remediation
efforts.
