免费久久99热只有频精品,色无码视频手机免费观看,99精品成人片免费毛片无码,亚洲三级片在线观看视频

HEDP

Products > HEDP

HEDP

1-Hydroxy Ethylidene-1,1-Diphosphonic Acid
(HEDP)

1-Hydroxy Ethylidene-1,1-Diphosphonic Acid
(HEDP)


CAS No.  2809-21-4

Molecular Formula:   C2H8O7P2                Molecular weight: 206.02

Structural Formula:

1-Hydroxy Ethylidene-1,1-Diphosphonic Acid (HEDP)

Properties:

HEDP is an organophosphoric acid corrosion inhibitor. It can chelate with Fe, Cu, and Zn ions to form stable chelating compounds.It can dissolve the oxidized materials on these metals’ surfaces. HEDP shows excellent scale and corrosion inhibition effects under temperature 250℃. HEDP has good chemical stability under high pH value, hard to be hydrolyzed, and hard to be decomposed under ordinary light and heat conditions. Its acid/alkali and chlorine oxidation tolerance are better than that of other organophosphoric acids (salt). HEDP can react with metal ions in water system to form hexa-element chelating complex, with calcium ion in particular. Therefore, HEDP has good antiscale and visible threshold effects. When built together with other water treatment chemicals, it shows good synergistic effects.

The solid state of HEDP is crystal powder, suitable for usage in winter and freezing districts. Because of its high purity, it can be used as cleaning agent in electronic fields and as additives in daily chemicals. 

Specification:

ItemsIndex
AppearanceClear, Colorless to pale yellow aqueous solutionWhite crystal powder
Active content (HEDP)%58.0-62.090.0 min
Active content (HEDP·H2O)%-98.0 min
Phosphorous acid (as PO33-)%2.0 max0.8 max
Phosphoric acid  (as PO43- )%0.8 max0.5 max
Chloride (as Cl-)%0.02 max0.01 max
pH (1% water solution)2.0 max2.0 max
Density  (20℃)g/cm31.40 min-
Fe, mg/L20.0 max10.0 max
Ca sequestration (mg CaCO3/g)500.0 min

Usage:

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.

Package and Storage:

HEDP liquid: 200L plastic drum,IBC(1000L),customers’ requirement.

HEDP solid: 25kg/bag,customers’ requirement.

Storage for twelve months in room shady and dry place.

Safety Protection:

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


临泽县| 东光县| 阳谷县| 分宜县| 呼图壁县| 呈贡县| 土默特左旗| 彰化市| 汕尾市| 长宁区| 合作市| 登封市| 宁城县| 陇南市| 柏乡县| 常山县| 新密市| 巨野县| 进贤县| 芷江| 江阴市| 堆龙德庆县| 新绛县| 商城县| 台中市| 无锡市| 白城市| 濮阳县| 修文县| 化隆| 中宁县| 内丘县| 福海县| SHOW| 佳木斯市| 巴东县| 武宣县| 凯里市| 扎囊县| 宁晋县| 稻城县|