WARNING
TM 5-6630-215-12
NOTE
The presence of chlorine residuals in excess of 1
mg/l will cause fading of the developed color and
thus result in error in reading.
This can be
overcome to a large degree by adding a small
grain of sodium thiosulphate to the cell prior to
the introduction of the pH indicator solution.
e. Comparator, Color, Hydrogen Ion and Residual Chlorine (fig.
2-16).
NOTE
Figure 2-16 and paragraph 2-22 e (1) apply to kits
of 1st buy only.
Refer to Figure 2-16.1 and
paragraph 2-22 e (2) for kits other than buy 1.
(1) Determination of Chlorine Residual. In determining these
values, this comparator measures them as simple numbers in the reading
window.
The arsenite (red) and orthotol idine (yellow) bottles are
color coded.
A prism eyepiece is furnished and must be positioned on
the bosses in order to insure accuracy.
Orthotolidine.
Danger, contains acid.
Can cause
severe burns.
Avoid contact with skin and eyes.
Avoid breathing vapors.
Antidote:
External,
flush with water.
If in eyes, wash for 15
minutes.
Get medical attention.
Internal, call
physician at once.
Do not induce vomiting or use
carbonates.
Give large amounts of water contain-
ing milk of magnesia.
Follow with raw white of
eggs beaten with water.
Keep away from children.
Wide Range D pH Indicator.
Danger, poison.
May
be harmful, fatal, or cause blindness if swallowed.
Cannot be made non-poisonous.
Keep container
closed.
Avoid prolonged or repeated breathing of
vapor.
Inflammable keep away from sparks or open
flame.
Antidote:
If swallowed, call physician
immediately.
First Aid:
Give a tablespoon of
salt in a glass of warm water and repeat until
vomit fluid is clear.
Give two teaspoonfuls of
baking soda in a glass of water.
Have patient
lie down and keep warm.
Cover eyes to exclude
light.
Keep away from children.
Change 1
2-65
