Page 6 - Combined_8_OCR

Manual Manufacturing Chemists’ Association, Inc. Tolylene Diisocyanate
Sheet
SD-73

The Manufacturing Chemists’ Association rec­ combination with any label, warning or other state­
ommends that all containers of tolylene diisocyanate ment required by statutes, regulations or ordinances:
should bear the following label in addition to or in

TOLYLENE DIISOCYANATE
DANGER! HAZARDOUS LIQUID AND VAPOR
CAUSES BURNS
Keep container closed.
Do not get in eyes, on skin, on clothing.
Do not breathe vapor.
Use only with adequate ventilation.
In case of contact, immediately flush eyes or skin with plenty of water
for at least 15 minutes; for eyes, get medical attention. Remove
and wash clothing before re-use.

7.2 HANDLING—GENERAL The dye and water are first added to the
reaction vessel, and the sawdust and Fullers Earth
7.2.1 Tolylene diisocyanate containers should are introduced and stirred for one hour. The re­
remain closed as much as possible, thus preventing mainder of the ingredients are then added with con­
the escape of irritating vapors. When it is necessary tinuous stirring. A total-of two hours’ stirring time
to open a container, workmen should wear the proper from the beginning of the addition of solution is
equipment (see Section 5.2). Adequate ventilation normally satisfactory. The finished powder is slight­
should also be available (see Section 4.3). ly moist but does not lump, and it can be removed
7.2.2 Spills as a loose mass. The powder can be stored in bags o
with polyethylene liners.
When tolylene diisocyanate leaks or spills oc­
The ethanol serves both as a solvent and as
cur, only properly protected personnel should remain a reactant for the formation of urethanes. The
in the area. Leaking containers should be removed
to the outdoors or to an isolated, well-ventilated triethanolamine is a powerful catalyst, and ammonia
area, and the contents transferred to other suitable serves to neutralize both liquid isocyanates and
containers. isocyanate vapors. The presence of water and
Fullers Earth reduces the flammability of the final
7.2.2.1 Spills on Floors and Other Flat mixture to a safe level.
Surfaces 7.2.2.1.2 If the neutralising powder des­
7.2.2.1.1 A powder has been developed cribed in Section 7.2.2.1.1 is not available, spills can
that is effective in neutralizing isocyanate spillage. be dealt with by covering with Fullers Earth or an
It is recommended that spills be covered with a absorbent clay. The absorbent can then be swept
thin layer of this powder. The isocyanate will be up and transferred to an open drum. The drum
absorbed and destroyed within a few minutes. The should be placed in a ventilated location or out of
product can then be swept away. doors, filled with water and allowed to stand for
48 hours. The contents of the drum can then be
The powder is made up as follows:
discarded.
Sawdust 23.0 lbs. After the absorbent has been swept up the.
Fullers Earth 38.5 lbs. area should be washed down with a 5 percent aqueous
61.5 lbs. of Carrier ammonia solution containing a detergent.
Solids
Ethanol 19.2 lbs. 7.2.2.2 Decontamination of Containers
Triethanolamine 3.8 lbs. 7.2.2.2 A Containers such as drums may
Concentrated be decontaminated by adding 5 to 10 pounds of the
Ammonia Solution 3.8 lbs. powder, letting the drum stand for a little while,
Water 11.5 lbs. and then rolling it a few times. The container should
Dye (water solvant 0.2 lbs. be continuously vented to prevent the build-up of
type) 38.5 lbs. of Active pressure. After approximately 20 minutes’ contact
Solution of the powder with the contents, the container may
100.0 lbs. Powder be washed with water.

10