Child Sucking Test
The American Association of Poison Control Centers
reports an average of 6,463 cases of Boric Acid Poisoning each year
A standard test in toxicological risk
assessments is that of a child sucking on the item. The test assumes a child
will suck a 50 sq cm area for one hour each day, suck a different area each
day, and ingest a percentage of the chemical contained in that area.
This sucking test was used in a National
Academies of Sciences study called
Toxicological Risks of
Selected Flame-Retardant Chemicals,
this study examined numerous flame retardants as possible uses on
upholstered furniture, and was commissioned by the CPSC. This 'sucking test’
was applied to every chemical it studied. The assumption being if a chemical
failed this test scenario, it should be rejected from consideration as a
flame retardant.
We have no exposure data for boric acid
mattresses. But we know boric acid is easily water soluble, that it exists
as loose dust simply mixed with the cotton fibers, and is at the surface of
the mattresses. We could assume the child might be able to suck 100% of the
chemical out in one hour. But we will use more conservative assumptions
below.
Twin Mattress |
|
|
|
Boric Acid in Mattress flame barrier |
|
|
|
10% |
14% |
|
|
grams |
386 |
540.4 |
|
|
mg |
386,000 |
540,400 |
|
|
|
|
|
|
|
width in |
length in |
sq in |
two sided |
sq in |
37 |
74 |
2,738 |
2 |
5,476 |
|
|
|
|
|
width cm |
length cm |
sq cm |
|
sq cm |
94 |
188 |
17,664 |
2 |
35,329 |
|
|
|
|
|
|
|
|
|
|
mg Boric Acid per sq cm at 10% treatment |
|
10.93 |
|
|
|
|
|
Discount by 50% for Boric Acid at surface |
5.46 |
|
|
|
|
|
mg contained in 50 sq cm sucking area |
273.15 |
|
|
|
|
|
Salvia Extraction and absorption percent |
25% |
|
|
|
|
|
mg absorbed |
|
|
68.29 |
|
|
|
|
|
Child weight, pounds |
|
30 |
|
Child weight, Kg |
|
13.64 |
|
mg/Kg absorbed |
|
|
5.01 |
|
|
|
|
|
Toxic level mg/Kg by EPA |
|
0.20 |
|
|
|
|
|
Exceeds Toxic level by times |
|
25.04 |
As you can see above we have discounted the
boric acid content by 50% for what is available at the surface, and we
assume the child can only suck out 25% of this chemical. For a 30 pound
child this exposure exceeds toxic levels by 25 times.
If the salvia extraction and absorption was
only 1%, the exposure would equal the toxic level. Thus every 1% gain in
absorption is the number of times the toxic level is exceeded. 10%
extraction would be 10 times toxic levels, and 50% extraction would be 50
times toxic levels for the 30 pound child.
Toxic levels depend on the weight of the
child or person. For an 11 pound child it would exceed toxic levels by 68
times. For a 180 pound person it would exceed toxic levels by 4 times.
We know Boric Acid is water soluble and
washes out if laundered. A great risk for sucking, and if a child has a
urinary accident will he lay in a pool of boric acid concentrate?
There are also concerns that even low level
exposures to poisons can harm children.
We know boric acid may not mix evenly in
the cotton batting, and there may be hot spots that contain a lot of poison.
If we had exposure data it seems boric acid
mattresses would easily be proven toxic.
If your child got sick from one of these
mattresses, it would be unlikely a doctor could diagnose the real problem.
There is no single biological marker for Boric Acid poisoning. Your child
might suffer permanent damage, or even death.
Inhalation, skin, and damaged skin
absorption may also reach toxic levels. But the risk to a child from sucking
should be enough alone, to tell us not to put poison in our mattresses.
The American Association of Poison Control
Centers reports an average of 6,463 cases of Boric Acid Poisoning each year.
Some result in permanent injury/disability and death. Boric Acid mattresses
may cause child poisonings, see:
http://www.peopleforcleanbeds.org/sucking_test.htm
2003, Chemicals, Borate/Boric Acid, 2,620 cases, 1,068 adults over 19, p44
Insecticides, Borate/Boric Acid, 3,578 cases, 485 adults, p50
Topical preparations, Boric Acid/Borate, 116 cases, 52 adults, p57
Total 2003 Boric Acid Poisoning Cases: 6,314
http://www.aapcc.org/Annual%20Reports/03report/Annual%20Report%202003.pdf
2002, Chemicals, Borate/boric acid, 2,724 cases, 1,071 adults, p44.
Insecticides, Borate/Boric Acid, 3,818 cases, 446 adults, p49
Topical preparations, Boric Acid/Borate, 196 cases, 81 adults, p58
Total 2002 Boric Acid Poisoning Cases: 6,738
http://www.aapcc.org/Annual%20Reports/02report/Annual%20Report%202002.pdf
2001, Chemicals, Borate/boric acid, 2,853 cases, 1,107 adults, p39
Insecticides, Borate/Boric Acid, 3,340 cases, 392 adults, p49
Topical preparations, Boric Acid/Borate, 145 cases, 53 adults, p58
Total 2001 Boric Acid Poisoning Cases: 6,338
http://www.aapcc.org/Annual%20Reports/01report/2001%20TESS%20Full%20Report.pdf
Three year average: 6,463 Boric Acid Poisoning Cases, 1,576 Adults, 4,887
Children.
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