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Firstly, one of its main composition is the acetone.

Its chemical formula is CH₃COCH3 and its Chemical name called Dimethyl Ketone.

Its melting point is -94.6oC and boiling point is 56.5oC. Its relative density is 0.788 kg/m2 and it has the typical reaction of ketones.

About the health effects: if you breathe acetones  more than 500mmp, you may feel headache and you may die if you breathe acetones more than 2000mmp. Put it into the oil pastel in order that make the composition else together.

It is made from some woods or calcareousness by some difficult technologies.

Put it into the oil pastel in order to lose the light of oil pastels.

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The paraffin wax’s lewis structure.

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Secondly, the next composition is paraffin.

Its chemical name is paraffin was and its chemical formula is C₃₁H64.

Paraffin wax is mostly found as a white, odorless, tasteless, waxy solid, with a typical melting point between about 46 and 68 °C, and a density of around 900 kg/m3. It is insulate in water , but soluble in ether, benzene, and certain esters. Paraffin is unaffected by most common chemical reagents but burns readily.

About what  effect for human being about it, it could softer skin. Paraffin wax can act as moisturizer that will help give you softer skin. Joint and Muscle Effects. Paraffin wax treatments are recommended for relieving joint pains. Pain Relief. Another effect of paraffin wax is that when the wax is applied to the skin.

It’s made from oils or another oils and people would use a technology to make it to be what we see.

Put it into the oil pastel in order to connect other compositions together.

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Thirdly, the last three main chemical composition is the pigment. There are a lot of different pigments according to the colorful oil pastels. Therefore we choose one of them to be an example ——the indigo.

Its chemical name is indigo and chemical formula is C₁₆H₁₀N₂O2.

Indigo has a melting point of 156.6°C and a boiling point of 2,075°C . Its  property allows it to be used in special equipment needed for temperatures near absolute zero. Absolute zero is the coldest temperature possible. It is about —273°C.

It’s not so harmful for the human being, but if you eat it very much, you may feel headache.

If you want to make some indigos. It’s made for some seeds, and through

People put it into the oil pastels in order to make the oil pastels colorful.

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The chemical structure of indigo.

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The anthocyan that could instead of the indigo in oil pastel.

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We may use the anthocyan to instead of the indigo.

Its Chemical name is anthocyan and chemical formula is C₁₅H₁₁O6.

It’s hard to be made for the normal people who are not a doctor or a scientist. But it’s helpful for our body and even there are a lot of illnesses could be cured by it as a lot of people know, meanwhile, it could change something’s color. Therefore, if it is feasible, the oil pastel could be safer.

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http://chanpin.molbase.cn/c8002-74-2#920d0bf074a8bf4fd2d80d94a7acbe18

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http://www.molbase.cn/cidian/3350097#a61b68b6baa99bd23401269280cdd6c3

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https://www.imore.com/apple-pencil-2

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 Debra Rose Wilson, PhD, MSN, RN, IBCLC, AHN-BC, CHT on March 28, 2018 

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 Debra Rose Wilson, PhD, MSN, RN, IBCLC, AHN-BC, CHT on March 28, 2018 

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https://www.healthline.com/health/paraffin-wax#at-home

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http://www.chemspider.com/Chemical-Structure.4477009.html

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http://cn.bing.com/images/search?q=paraffin+wax+lewis+structure&qs=SC&form=QBIR&sp=1&pq=paraffin+wax+lewies&sc=1-19&cvid=8DF56BEE7F53478DB65B043DC072F149

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http://www.molbase.cn/cidian/3350097#a61b68b6baa99bd23401269280cdd6c3

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As we all know, it’s created by Apple company. We could do anything by it on our iPad. We don’t need to worry about if it is harmful for our children’ skin or body, because its compositions which our skins are able to tough are all harmless. And it could do everything that oil pastel could do such as drawing, it could also do a lot of things that oil pastels cannot do such as writing and move the website, of course it has to work with a suited iPad. Therefore, this is one of its disadvantages, it cannot draw or write on a normal paper.

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iPad pencil.