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OCR for page 18
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Name: CALCIUM HYPOCHLORITE
CAS No.: 7778-54-3
Chemical Formula: Ca(OCl)2
Description:
NAS/CWTC 006-82
Formula Weight: 143.1
A white or yellowish-white powder with a strong chlorine
odor; hydroscopic and corrosive. It is available at a
commercial strength of 70% available C12.
Use:
Used for disinfection, color removal, iron and manganese
removal, and taste and odor control.
Purity Requirements:
The RMIC values are based on a maximum dosage of 20 mg of
calcium hypochlorite/liter of water and are to be com-
pared to impurity concentrations obtained by using sample
procedures described in this monograph. If the actual
dosage is other than 20 mg/liter, the user is cautioned
to consult Table 2 for appropriate RMIC values.
RMIC mg Impurity/kg
Impuritv Calcium Hynochlorite
Mercury
Bulk Sample Collection:
10
Sample in accordance with Standard for Calcium Hypochlo-
rite, AWWA B300-80, American Water Works Association,
Denver, Colorado (1980).
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Analytical Sample Preparation:
Weigh out 2.5 g of calcium hypochlorite. In a 150-ml
acid-washed beaker dissolve the sample in 100 ml of
deionized distilled water. Under a hood, acidify the
solution with concentrated HNO3 to a pH of less than
2. Gently heat the solution to reduce the volume below
100 ml, making certain that it does not boil. Quanti-
tatively transfer to a 100-ml acid-washed volumetric
flask and make to volume with deionized distilled water
Process a reagent blank by the same procedure
Sample Analyses:
~ —
The analyses are to be performed on the calcium hypochlo-
rite solution in accordance with:
Standard Methods for the Examination of Water and Waste-
water, 15th Edition, American Public Health Association,
Washington, D.C. (1981).
Mercury
Section 303F
All products used for disinfection that contain this
compound must be registered as prescribed by the Federal
Insecticide, Fungicide and Rodenticide Act.
Representative terms from entire chapter:
rmic values
