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Ethylenediaminetetraacetic acid disodium salt

  • CAS NO: 139-33-3
  • Grade: industry grade
  • Specs: powder
  • Packaging: 25kg bag
  • Capacity: 4000MTS/month
  • Price: Inquiry

Characteristic

1. EDTA has extensive coordination properties and almost can form stable chelates with all metal ions.

Advantage: provides the possibility of extensive determination of elements (superior to acid and precipitation).

Disadvantages: interference between various components is selective.

The ratio of 2. EDTA to M- EDTA is 1:1.

3. most of the chelates are charged, so they can be dissolved in water and react rapidly CASNo:6381-92-6.

Toxic protection: This product is low toxic. The oral LD50 of rats was 2000mg/kg. Other toxic and protective contents refer to ethylene diamine tetra acetic acid.

Packaging: packed in cartons or gunny bags lined with double plastic bags, 80kg per bag.

Physicochemical properties: white crystalline powder. Low toxicity, soluble in water, 5% of the aqueous solution pH value of 4~6. Acidity. It is hard to dissolve in alcohol.

It is mainly used as complexing agent.

Dissociation balance

In aqueous solution, 2 carboxyl groups H+ are transferred to amino N to form bipolar ions.

EDTA is often expressed as H4Y, because its solubility in water and acid is very small, commonly used for its disodium salt: Na2H2Y. 2H2O, also abbreviated as EDTA.

When the acidity of the solution is high, the two carboxyl groups can accept H +, forming H 6Y 2 +, which is equivalent to a hexabasic acid and has a six-order dissociation constant.

Ka1=10-0.9; Ka2=10-1.6; Ka3=10-2.1; Ka4=10-2.8; Ka5=10-6.2; Ka6=10-10.3.

Seven forms:

H6Y2+, H5Y+, H4Y, H3Y-, H2Y2-, HY3-, Y4-

When pH<1, it mainly exists in the form of H6Y2+.

When pH>11, it mainly exists in the form of Y4- - coordination ion.



Test Item

Standard

Test Resul

Apprearance

White Crystalline Powder

White Crystalline Powder

PH 5% P-P 25

4.0-5.0

4.3

Purity,%

99.0

99.5

Clarity Test

PASS

PASS

Chelate Value(mg/g)

260

265

Heavy Metals (as Pb),%

0.001

0.001

Fe,%

0.001

0.001

Chlorides,%

0.05

0.01

SO4,%

0.001

0.0007

NTA,%

--

Test Conclusion:PASS.

CAS NO.
139-33-3
Name
Ethylenediaminetetraacetic acid disodium salt
Alias
Edetic acid disodium salt; EDTA disodium salt; (Ethylenedinitrilo)tetraacetic acid disodium salt
Formula
C10H14N2Na2O8
Formula weight
336.21
Structural formula
Melting point
237-245 ºC
Hazard Symbols
   Xn   
Safety Description
S26;S37/39   
Risk Codes
R22;R36/37/38   
  • Payment term: T/T 30% in advance and T/T 70% against copy of B/L. or 100% L/C at sight.
  • Shipment time: Within 3 weeks after confirming order.
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Provide quality after-sale service once the container is received.

   In case the product is damaged, we will refund you or resend a new packaging.
   Also, if the goods are not as per your specification, we will callback the container at our cost, or compensate you as per our agreement.

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