This document summarizes the chemistry of sunscreen. It explains that there are two main types of sunscreen - organic and inorganic. Organic sunscreens contain carbon-based ingredients like oxybenzone, avobenzone, and homosalate that absorb UV rays through their chemical bonds. Inorganic sunscreens contain titanium dioxide or zinc oxide that reflect and scatter UV rays. Both organic and inorganic sunscreens can protect skin from the sun's radiation, but inorganic sunscreens may leave a white residue that scientists are working to reduce with additives like oils. The document stresses the importance of applying sunscreen regularly to avoid sunburns and reduce skin cancer risk.

1. CHEMISTRY OF
SUNSCREEN
By: Ally Bateman

2. Introduction
Sunscreen is a chemical compound that helps protect you
from UV rays the sun puts off
We can see visible light reflected by the sun and the infrared
radiation the sun gives off can be felt on our skin when we
get hot (Jaworek-Lopes Sittenfeld 12)

3. There are two different types of sunscreen, organic and
inorganic, both will protect you from the sun. They just contain
different ingredients.
Some organic or carbon based ingredients are oxybenzone,
avobenzone, 4-methylbenzylidene, octyl methoxycinnamate, and
homosalate (Reisch 2)

4. These organic shapes are hexagonal shapes with double bond
single bond rotation also known as benzene
The molecules absorb the rays from the sun through their
chemical bonds. As they absorb the particles in sunscreen,
break down and release heat (Grifantini 3)

5. Inorganic ingredients are, titanium dioxide and zinc oxide. The
inorganic molecules are not carbon based (Jaworek-Lopes
Sittenfeld 12)
They reflect and distribute the sun’s rays
http://youtu.be/wopwVVsbvWI

6. Inorganic sunscreens tend to leave a white residue behind. To
get rid of this residue scientist have added oil, which makes
the sunscreen more transparent
“Its new Solaveil Clarus line has particle size distribution
between 40 and 50 nm, offering not only good UV protection
but also avoiding the occurrence of large particles that give a
whitening effect.”

7. Putting sunscreen on before
you go out to the pool or if you
are going to be outside for a
long time is very important.
Exposing your skin to so much
sunlight without protection such
as sunscreen can damage your
skin because of the different
types of radiation its rays put
off.
Without sunscreen you can get
a sunburn or even worse skin
cancer. “A tan is the body’s
reaction to damage,” Coty
Senior Vice President of R&D
Ralph Macchio says” (Reisch 1).
You should listen to your moms
and dads and apply sunscreen
even if you don’t think you need
it, and you should reapply
regularly to make sure you don’t
get burned.

8. Works Cited
Grifantini, Kristina. “How Does Sunscreen Work?” Live Science. Tech media network, 25 June 2010. Web. 13
Apr. 2014. <http://www.livescience.com/32666-how-does-sunscreen-work.html>.
Jaworek- Lopes, Christine H., and David Sittenfeild. “Sunscreens.” Celebrating Chemistry 2012: 12-13. ASC.
Web. 13 Apr. 2014. <http://www.acs.org/content/dam/acsorg/education/outreach/ncw/celebrating-
chemistry-2012-nanotechnology.pdf>.
Reisch, Marc. “Sunscreens.” Science & Technology 80.25 (2002): n. pag. Pubs.acs.org. Web. 13 Apr. 2014.
<https://pubs.acs.org/cen/whatstuff/stuff/8025sunscreens.html>.