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Second Fork HEDP acid
1-Hydroxy Ethylidene-1,1-Diphosphonic Acid (HEDP)
【CAS】 2809-21-4
Alias: Asia-acid ethyl IIDequest:2010
C2H8O7P2molecular formula molecular weight: 206.02
First, the product characteristics
HEDP is an organic phosphonic acid corrosion inhibitor and scale,
with iron, copper, zinc and other metal ions to form a stable
complex, to dissolve the surface of metal oxide. In the next
250still play a good role in corrosion and scale inhibitors in high
pH stability is still under difficult to hydrolysis, light and heat
conditions in general difficult to break down. Acid,
oxidation-resistant than other organic acid (salt) good. With metal
ions in the water, in particular the formation of six calcium
chelate ring, and thus be better and have the effect of scale
soluble obvious effects are limited, and other water treatment
agent using the compound has shown the desired synergy .
HEDP solid belong to high-purity products, applies to the winter
cold regions; particular, the electronics industry apply to the
cleaner use of chemicals and additives day.
Second, the quality indicators in line with HG / T 3537-1999
Item | Indicators | |
HG/T 3537-1999 | ||
Appearance | Colorless or yellowish transparent liquid | Solid white powder |
Active component (to include HEDP)% ≥ | 50.060.0 | 89.0 |
Phosphite (PO33-to-total)% ≤ | 2.02.0 | 0.80 |
Phosphoric acid (PO43-to-total)% ≤ | 0.80.8 | 0.50 |
Chloride (Cl-to-total)% ≤ | 1.01.0 | |
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