Hydroxyethylamino-Di(Methylene Phosphonic Acid) (HEMPA)

PRODUCTS > Phosphonates Antiscalants, Corrosion Inhibitors and Chelating Agents > Hydroxyethylamino-Di(Methylene Phosphonic Acid) (HEMPA)

Hydroxyethylamino-Di(Methylene Phosphonic Acid) (HEMPA)

CAS No. 5995-42-6
Molecular weight: 249

CAS No. 5995-42-6

Molecular weight: 249

Structural Formula:



HEMPA is an organophophoric acid, which exhibits excellent chelation, scale inhibition and corrosion inhibition. It is mainly used in oilfield, detergent / soap and metal treatment etc, especially useful in the water sytems with high level of dissolved iron and calcium. It is also compatible with methanol/water solution. When built together with other water treatment chemicals, it shows good synergistic effects.


Items Index Index
AppearanceColorless to light yellow transparent liquidColorless to light yellow transparent liquid
Active content %50.0% min60.0 min
PH (1% water solution)2.0 max2.0 max
Chloride (as Cl-)%5.0 max5.0 max
Fe, mg/L20.0 max20 max
Density (20℃) g/cm31.20 min1.30 min


HEMPA is usually used together with other organophosphoric acid, polycarboxylic acid and salt in different areas.

Package and Storage:

250kg/drum; 1250kg/IBC; or customers' requirement. Storage for ten months in shady room and dry place.

Safety Protection:

Avoid contact with eye and skin. Goggles and rubber gloves should be used at all times while handling the product.


Ethanolamine bis(methylenephosphonic acid); EABMP Acid

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