Molekula
Ethylenediaminetetraacetic acid disodium magnesium salt tetrahydrate
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 1999 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
Ethylenediaminetetraacetic acid disodium magnesium salt tetrahydrate (EDTA-Mg) is a chelating agent used in pharmaceuticals and cosmetics, and as an analytical reagent in complexometric (substitution) titrations of calcium and other metals with Eriochrome Black T. This water-soluble salt maintains efficacy while offering a balanced magnesium complex for controlled metal ion sequestration. CAS 29932-54-5, molecular formula (NaOOCCH2)2NCH2CH2N(CH2COO)2Mg·4H2O, molecular weight 430.56 g/mol. Store at ambient conditions with no signal word classification.
Molekula supplies Ethylenediaminetetraacetic acid disodium magnesium salt tetrahydrate at >98.0% purity in 25 g packs, from £37.08 inc. VAT. It is in stock for same-day dispatch. Every batch ships with a certificate of analysis, and safety data sheets are available in 6 languages. Larger quantities, up to multi-tonne, are quoted on request.
Example image for illustration only. Other packaging and pack sizes are available.
Pricing & pack sizes
In stock — same-day dispatch
These pack sizes aren't a limit. Molekula manufactures, sources and repacks to order — if you need 500 kg and only see 1 kg listed, . We quote from grams to multi-tonne.
Need a different size? Add the nearest pack and change the size in your basket — we price it at the same rate per unit.
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25 g — £30.90 per pack ex VAT · £37.08 inc. VAT
Need a different quantity or pack?
Tell us how much you need and when — drums, IBCs, sacks or a one-off bulk lot. We'll manufacture or source it and come back with a price.
Prices exclude VAT/sales tax and shipping.
Specifications
| Property | Value |
|---|---|
| Appearance | White crystalline powder |
| Chloride (Cl-) | <0.005% |
| Purity | >98.0% |
| Iron (Fe) | <0.002% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Neutral |
Identification
| Property | Value |
|---|---|
| SKU | 90025603 |
| CAS Number | 29932-54-5 |
| Molecular Formula | (NaOOCCH2)2NCH2CH2N(CH2COO)2Mg · 4H2O |
| Molecular Weight | 430.56 |
| SMILES | O=C(CN(CCN(CC(O[Na])=O)CC(O[Na])=O)C1)O[Mg]OC1=O.C |
| REACH Code | Y113 |
| HTS Code | 29224980 |
| Tariff Code | 2922498590 |
Safety & GHS
Precautionary statements
- P280 Wear protective gloves/protective clothing/eye protection/face protection
Documents
Safety Data Sheets (SDS)
Available in English, French, German, Italian, Russian, Spanish.
Certificate of Analysis (CoA) by batch
Enter a lot or batch number to retrieve the CoA for that specific batch. We can generate one from spec data if no PDF is on file.
Quality certificates
Molekula Group is certified to ISO 9001:2015 (quality) and ISO 14001:2015 (environmental management), audited by a UKAS-accredited body. Both certificates are valid to 17 May 2028.
Synonyms
No alternate names recorded for this product.
Frequently asked questions
What is ethylenediaminetetraacetic acid disodium magnesium salt tetrahydrate used for?
This compound is commonly used as a chelating agent in pharmaceuticals, cosmetics, and water treatment to bind metal ions such as calcium, preventing precipitation or unwanted reactions. Because its EDTA is already complexed with magnesium, it releases Mg2+ when it exchanges with metals that bind EDTA more strongly, which is the basis of its use as an analytical reagent in complexometric (substitution) titrations of calcium and other metals with Eriochrome Black T.
What is the chemical formula and molecular weight?
The formula is (NaOOCCH₂)₂NCH₂CH₂N(CH₂COO)₂Mg · 4H₂O, and the molecular weight is 430.56 g/mol.
What safety precautions or signal word apply to this product?
This product has no signal word and is classified as low hazard under standard handling conditions, but standard lab safety practices (gloves, goggles) are recommended.
How should this product be stored?
Store at ambient temperature in a tightly sealed container, away from moisture and direct sunlight to maintain stability.
What grades (e.g., USP, ACS, technical) does Molekula supply for this product?
Molekula supplies this product at a purity of >98.0%, with chloride (Cl-) below 0.005% and iron (Fe) below 0.002%; please inquire for specific certifications like USP or EP if required.
Can Molekula supply this product in bulk quantities?
Yes, we offer bulk packaging options (e.g., 1 kg, 5 kg, 25 kg drums) for industrial or large-scale applications—contact us for custom quotes.
Where can I buy Ethylenediaminetetraacetic acid disodium magnesium salt tetrahydrate?
Directly from Molekula, which lists Ethylenediaminetetraacetic acid disodium magnesium salt tetrahydrate in 25 g packs from £37.08 inc. VAT, with a certificate of analysis for every batch. Larger quantities are quoted on request. Molekula's offices: United Kingdom, France, Spain, Germany, Italy, United States and China.
Ready to order or need a custom pack?
Tell us the product, grade, and quantity — Molekula usually responds within one working day with pricing and lead time.