
2, 3-dimercaptosuccinic acid (), also known as 2, 3-dimercaptosuccinic acid, is an organic sulfur compound, white crystalline powder at room temperature. Because the molecule contains two sulfhydryl groups, it has the characteristic odor of sulfhydryl compounds. Both dimercaptosuccinic acid and its sodium salts can be used as antidotes to treat heavy metal poisoning. Dimercaptosuccinic acid has two diastereoisomers, one is a meso and the other is a racemic. Racemes can be used as chelating agents, and sodium salts are commonly used.
DMSA is also a preferred lead poisoning antidote, particularly in children as it is less toxic than DMPS. Meso-DMSA has multiple advantages over other chelators, such as low toxicity, no redistribution of metal from one organ to another.

| White or off- White crystalline or crystalline Powder | ||
| 190 degree -194 degree | 192 degree -193.5 degree | |
| PH2.5-3.0 | 2.6 | |
| Less than or equal to 1.0% | 0.04% | |
| Less than or equal to 0.1% | 0.01% | |
| Less than or equal to 10ppm | <10ppm | |
| Greater than or equal to 98.5% | 99.50% | |
Succimer is a heavy metal chelator. It binds with high specificity to ions of lead in the blood to form a water-soluble complex that is subsequently excreted by the kidneys. Succimer can also chelate mercury, cadmium, and arsenic in this manner. Rapid but variable.
DMSA is very safe and generally well tolerated, with few side-effects being noted. Some patients may experience slight gastrointestinal disturbances or urticaria, but it is not usually necessary to discontinue treatment. 25 Any detoxification regimen requires the bowels to be fully functioning.




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3-7 days |
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Suitable for under 50kg. |
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7-15 days |
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Suitable for more than 50kg. |
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15-60 days |
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Suitable for more than 500kg. |
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