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Etidronic acid 98% CAS NO 2809-21-4 

  产品分类 : 化學->化學用品->冷卻水處理藥劑

     
Etidronic acid 98% CAS NO 2809-21-4
         

  产品规格
 
Model No:    cy2809-21-4
  Country  CN
  Brand  cy
  Packing  25kg
  Minimum Order  25
  Payment Term  L/C,T/T

 

  产品描述
   
  <p>
Hydroxyl ethylidene two phosphonic acid
</p>
<p>
Chinese alias: etidrophosphine; 1-hydroxyethylene-bisphosphonic acid; 1-hydroxyethylene-1,1-bisphosphonic acid; etidronic acid; hydroxyethylene-bisphosphonic acid;
</p>
<p>
English Name: etidronic acid
</p>
<p>
English alias: (1-Hydroxyethane-1,1-diyl) diphosphonic acid; Etidronsaeure; Acetodiphosphonic acid; ethane-1-hydroxy-1,1-diphosphonic acid; 1-Hydroxyethylidene-1,1-diphosphonic acid;
</p>
<p>
CAS: 2809-21-4
</p>
<p>
Molecular formula: C2H8O7P2
</p>
<p>
Molecular weight: 206.02800
</p>
<p>
Precise quality: 205.97500
</p>
<p>
PSA:154.91000
</p>
<p>
Physicochemical properties
</p>
<p>
Appearance and properties: pale rice powder
</p>
<p>
Density: 1.45 (60% aq.)
</p>
<p>
Melting point: 198~199 C
</p>
<p>
Boiling point: 578.8 C at 760 mmHg
</p>
<p>
Flash point: 303.8 x C
</p>
<p>
Stability: Stable. Incompatible with strong oxidizing agents.
</p>
<p>
Steam pressure: 8.34E-16mmHg at 25 degree C
</p>
<p>
security information
</p>
<p>
Package level: II
</p>
<p>
Risk category: 8
</p>
<p>
Customs Code: 2931900090
</p>
<p>
Dangerous goods transportation Code: UN 3265
</p>
<p>
WGK Germany:2
</p>
<p>
Danger category code: R37/38; R41
</p>
<p>
Safety instructions: S26-S39
</p>
<p>
RTECS: SZ8562100
</p>
<p>
Dangerous goods sign: Xi
</p>
<p>
purpose
</p>
<p>
HEDP is an organic phosphonic acid scale and corrosion inhibitor, which can form stable complexes with iron, copper, zinc and other metal ions and dissolve oxides on metal surface. It can still play a good role in corrosion and scale inhibition at 250 C. It is still very stable at high pH. It is not easy to hydrolyze and decompose under ordinary photothermal conditions. The acid and alkali resistance and chlorine oxidation resistance are better than those of other organic phosphonic acids (salts). It can form hexacyclic chelate with metal ions in water, especially calcium ions, so it has better scale inhibition effect and obvious solubility limit effect. When combined with other water treatment agents, it shows an ideal synergistic effect. HEDP solid belongs to high purity products, suitable for winter cold areas; especially suitable for cleaning agents and daily chemical additives in the electronics industry.
</p>chenyichem.com

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