Synonyms: Vita-D-Chlor Neutral; sodium ascorbate, vitamin C
Certification: NSF/ANSI Standard 60 to 12 mg/L (Vita-D-Chlor, Neutral manufactured by Integra Chemical Co.)
Shelf life: Up to 3 years
Solution pH: Great for treatment of high chlorine levels because it remains pH neutral (pH 7) at all concentrations
Solubility in water: Highly soluble for concentrations of up to 50% (4 lbs per gallon)
Usage rate to neutralize 1 ppm Cl in water: ~1 gram/100 gallons or 1 lb per 45,000 gallons
Sodium ascorbate (vitamin C) is particularly useful for dechlorination of large tanks due to its quick dissolve rate. Its viability as a substitute for sulfite dechlorination is only an economic decision as its benefits are clear on an environmental basis due to the tendency of sulfites to deplete oxygen. When compared with ascorbic acid (also vitamin C), the neutral pH of sodium ascorbate makes it the preferred option for treating large volumes of water that contain high levels of chlorine (>10 ppm).
The toxicity of chlorine is not always understood since it is consumed by the average household everyday, and some of us swim in it at relatively high concentrations. However, the lethal concentration of sodium hypochlorite (chlorine) to rainbow trout is approximately 0.2 mg/L and for the Daphnia Pulex the lethal dose is approximately 0.03 mg/L (Source: US Environmental Protection Agency). What does this mean? It means that a pool that has 2 ppm (mg/L) of chlorine could pollute a body of water 10-100 times its size if sent to the storm drain. Similarly, water main flushing programs could send 10,000 gallons or more at 0.2 ppm, per hydrant, to the environment. When sending these volumes of water to the storm drain, it is a very important matter that the chlorine be removed, and it's a simple procedure to use sodium ascorbate to remove that chlorine via liquid injection feeders or mixing it into a batch tank. Please review this helpful report from the US Forest Services for information about Vitamin C dechlorination.
Usage Information
The NSF certification for the Vita-D-Chlor, Neutral (manufactured by Integra Chemical Co.) means it may be used in areas where the chemical could end up in potable water systems. The max use level certified by the NSF foundation for drinking water is stated as 12 mg/L (ppm).
Use the calculator below to find if sodium ascorbate, or another chemical provided by PromagEnviro.com is right for your application. Actual results may vary:
Applications
Dechlorination chemicals are used whenever tap water or other chlorinated water is discharged to a storm drain or near creeks, streams, ponds, rivers, lakes, oceans or ground water. These are some typical applications where dechlorination is needed:
Hydrant flushing
Swimming pool drainage
New main installations, maintenance and repairs
Reservoir, water tank or well cleaning
Wastewater effluent release
Reservoir overflow
Municipal parks swimming pool drainage
Fire flow testing
Filter backwash
Dewatering
Highly chlorinated water release to wastewater treatment plant
Permit compliance and Emergency situations.
Further Information
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