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High Efficiency Catalyst for Oil Industry Water Treatment Chemicals HEDP 60% 90%

 

CAS No. 2809-21-4                               

EINECS No. 220-552-8

Molecular Formula: C2H8O7P2        

Molecular weight: 206.02

Chemical Name: 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid (HEDP)

Other Name: Etidronic Acid

Items
Index
Appearance
Clear, Colorless to pale yellow aqueous solution
White crystal powder
Active content (HEDP)%
60.0 min
90.0 min
Active content (HEDP,H2O)%
-
98.0 min
Phosphorous acid (as PO33-)%
1.0 max
0.8 max
Phosphoric acid (as PO43- )%
0.6 max
0.5 max
Chloride (as Cl-)%
0.01 max
0.01 max
pH (1% water solution)
2.0 max
2.0 max
Density (20≧)g/cm3
1.40 min
-
Fe, mg/L
10.0 max
5.0 max
Colour APHA (Hazen)
10.0 max
-
Ca sequestration (mg CaCO3/g)
500.0 min
-

 

 

Usages

 

HEDP is used as scale and corrosion inhibition in circulating cool water system, oil field and low-pressure boilers in fields such as electric power, chemical industry, metallurgy, fertilizer, etc.. 

 

In light woven industry, HEDP is used as detergent for metal and nonmetal. In dyeing industry, HEDP is used as peroxide stabilizer and dye-fixing agent; In non-cyanide electroplating, HEDP is used as chelating agent. 

 

The dosage of 1-10mg/L is preferred as scale inhibitor, 10-50mg/L as corrosion inhibitor, and 1000-2000mg/L as detergent. Usually, HEDP is used together with polycarboxylic acid.

 

Packing and delivery

HEDP 60%: 25L or 200L plastic drum, IBC(1000L), customers¨ requirement.

HEDP 90%: 25kg/bag, customers¨ requirement.

Storage for ten months in room shady and dry place.

 

Acidity, Avoid contact with eye and skin, once contacted, flush with water. 

 

 
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