HEDP
Description
HEDP is a 60% active aqueous solution of Hydroxyethylidene-diphosphonic acid (HEDP). It provides control of calcium and other metal salts including iron and manganese by acting as a strong crystal modifying agent and threshold inhibitor. HEDP is known to be a sequestrant and excellent deposit control agent.
Applications
Cooling Water Treatment
Swimming pools
Reverse Osmosis formulation
Industrial Cleaners
Metal Finishing
Textiles
Petroleum secondary recovery
Typical Properties
Appearance
Clear to yellow
pH
<2
% Active
60
Iron (ppm as Fe)
<35
Viscosity (25°C cST)
38
Chloride %
<1
Phosphorous acid %
<4.0
Specific gravity (20°C)
1.45
Packaging and Handling
HEDP is a water-soluble acidic liquid packed in non-returnable drums. Like all aqueous solutions, HEDP may freeze if exposed to very low temperatures. It should be stored where the temperature stays above 0°C (32°F). Should the product freeze, store it in a warm area until completely thawed before using it. Keep container closed when not in use.
Toxicology/Ecological Data
Acute Oral toxicity - LD50 - rats >2000 mg/Kg
Eye - rabbit
Irritant
Skin - rabbit
Non-irritant - rainbow trout
Other information
Not a skin sanitizer - Daphnia
96 hour LC50
>300 mg/L
48 hour EC50
>500 mg/L
Biodegradation (Zahn-Wellens)
33% degradation in 28 days
Logistics
HEDP is supplied in polyethylene drum containing 530 pounds per drum.
If you would like more information about becoming a distributor of Midsouth Chemical's products, Contact Us!