Complaint
Sodium gluconate is the sodium salt of gluconic acid, produced by fermentation of glucose. It is a white to tan, granular to fine, crystalline powder, very soluble in water.
The outstanding property of sodium gluconate is its excellent chelating power, especially in alkaline and concentrated alkaline solutions. It forms stable chelates with calcium, iron, copper, aluminium and other heavy metals, and in this respect, it surpasses all other chelating agents, such as EDTA, NTA and related compounds.
Aqueous solutions of sodium gluconate are resistant to oxidation and reduction, even at high temperatures. However, it is easily degraded biologically (98 % after 2 days), and thus presents no wastewater problem.
Sodium gluconate is also a highly efficient set retarder and a good plasticiser / water reducer for concrete, mortar and gypsum.
| Item | Standard | Result |
| Appearance | White crystal granule or powder | Qualified |
| Soluble | Colorless or slightly yellow, Almost Clear | Qualified |
| Smell | With the inherent special smell | Qualified |
| Assay (%) | ≥ 98 | 99.65 |
| Whiteness (%) | ≥75 | 80 |
| Loss on drying (%) | ≤ 0.5 | 0.4 |
| Reducing substances % | ≤ 0.5 | 0.3 |
| Chloride % | ≤ 0.05 | 0.01 |
| Sulphate% | ≤ 0.05 | 0.01 |
| PH Value ( 10% solution ) | 6.2-7.8 | 7.5 |
| Heavy metals ( pb ), mg/kg | ≤ 5 | < 5 |
| Arsenic mg/kg | ≤ 1 | < 1 |
| Conclusion: | The product above complies with the standard of TECH GRADE. | |
