Analysis of Kryptonite Sample
arrived as small particles of rock in a 5/8ths dram volume glass vial from Scitoys.com .
The rock particles appeared white to yellow, with a green cast. In the dark, the
material glowed brightly green. Experiments showed the glow to be phosphorescence
charged by sunlight, but unlike normal phosphorescent materials such as zinc sulfides,
the glow persists for over 12 hours, decaying exponentially with time.
Analysis shows the material to be Strontium Magnesium Aluminate, doped with Europium
and Dysprosium rare earth lanthanates, in an unknown inert matrix.
While the sample is reported to be toxic to certain extraterrestrial organisms, this
sample has low acute oral and dermal toxicity to rats, and is not irritating to rabbit
skin or sensitizing to guinea pig skin. It is a slight irritant to rabbit eyes, with
iris and conjunctival effects which cleared by 72 hours. These effects are likely to
be due to mechanical irritation from insoluble particulate matter. In a 28 day repeat
dose oral toxicity study, no treatment related adverse effects were seen at the only
tested dose of 1000 mg/kg bw/day. It was found to not be genotoxic in an in vitro and
an in vivo test.
The constituent ions of the notified chemical (strontium, aluminium and lanthanides)
are all of low acute oral toxicity, and are not likely to produce irritant effects
unless in reactive forms.
There may be inhalation risk or irritation if powdered forms of the material are used,
but the sample arrived in solid pieces generally larger than a millimeter in diameter.
The inhalation of airborne dusts will be reduced to a great extent by the high specific
gravity of the material, the small proportion in the respirable size range, and the
use of local exhaust ventilation.