GLDA.Na4 User Manual

Chemical Name: Tetrasodium Glutamate Diacetate (GLDA.Na₄)
CAS No.: 51981-21-6
Molecular Formula: C₉H₉NNa₄O₈
Appearance: White or light yellow crystalline powder
Solubility: Highly soluble in water (>500 g/L at 20°C)
pH (1% solution): 10.5–12.0
Biodegradability: >90% (OECD 301D certified)

GLDA.Na₄ is a biodegradable, non-toxic chelating agent derived from natural L-glutamic acid. It is widely used as an eco-friendly alternative to EDTA, NTA, and phosphonates in industries such as detergents, personal care, agriculture, and water treatment.

✅ High Chelating Efficiency:

• Effective binding of Ca²⁺, Mg²⁺, Fe³⁺, and heavy metals (Pb²⁺, Cu²⁺).

• Stable over a wide pH range (3–12).

✅ Environmentally Friendly:

• Readily biodegradable (OECD 301D).

• No aquatic toxicity (EC50 >100 mg/L for fish and algae).

✅ Safe for Human Use:

• Skin-friendly (used in cosmetics and personal care).

• Approved by ECOCERT and COSMOS for organic formulations.

✅ Thermal Stability:

• Stable up to 200°C, suitable for high-temperature applications.

• Function: Softens water, prevents scale deposition, and boosts surfactant performance.

• Recommended Dosage: 0.5–5% (depends on water hardness).

• Use Cases: Shampoos, soaps, creams (stabilizes formulations, chelates metal ions).

• Dosage: 0.1–2% (compatible with preservatives like phenoxyethanol).

• Scale & Corrosion Inhibition:

• Effective in cooling towers, boilers, and RO membranes.

• Dosage: 5–20 mg/L (adjust based on water analysis).

• Micronutrient Delivery: Enhances fertilizer efficiency by chelating Fe, Zn, Mn.

• Dosage: 0.1–1 kg/ton of fertilizer.

• Metal Surface Treatment: Removes rust and calcium deposits.

• Formula Example: 5–10% GLDA.Na₄ + 2% citric acid.

• Storage Conditions:

• Keep in a cool, dry place (avoid moisture).

• Shelf life: 24 months in sealed original packaging.

• Safety Precautions:

• Wear gloves and goggles when handling.

• Non-hazardous (LD50 >2000 mg/kg, OECD 423).

✔ Compatible with:

• Anionic & nonionic surfactants (SLS, SLES, APG).

• Oxidizing agents (H₂O₂, peracetic acid).

• Most polymers (PAA, PASP).

✖ Avoid mixing with:

• Strong acids (pH <2 may precipitate free GLDA).

• High concentrations of Al³⁺/Fe³⁺ (may form insoluble complexes).

• EU REACH: Registered (no SVHC listing).

• US EPA: Approved for use in cleaning products.

• China GB: Meets eco-label standards.

Contact: [Your Supplier’s Email/Phone]

Q: Can GLDA.Na₄ replace EDTA?
A: Yes, it is a biodegradable alternative with similar chelation performance.

Q: Is it safe for septic systems?
A: Yes, it degrades rapidly and does not accumulate in the environment.

Q: What is the recommended dissolution method?
A: Stir in water at room temperature (no heating required).

Note: For technical support or custom formulations, consult your supplier.
Version: 1.0 | Date: [Issuance Date]

This manual provides a concise yet comprehensive guide for GLDA.Na₄ users. Adjust dosages based on specific applications and water quality.