1. Chemistry in cosmetics
Cosmetics :In Greek  (kosmetikē tekhnē),
"technique of dress and ornament"
Make-up: Any substances or products used to enhance the appearance.
Common cosmetics:  
Lipstick, mascara, eyeshadow, foundation, rouge, skin cleansers and skin lotions, shampoo, hairstyling products (gel, hair spray, etc.) and perfume

2. Chemistry in cosmetics
Creams:
Creams are semi-solid emulsions of water and oil or o/w.
Uses:
Protect the skin
Retention of moisture
Cleansing
Emollient

3. Chemistry in cosmetics
Creams:
Composition:
1- Vegetable oil or fat.
2- Waxes such as bees wax.
3- Lanolin (from sheep’s wool).
4- Perfume.
5- emulsifier.
6- water.

4. Perfumes: Composition:
1- Odoriferous substances: organic compounds with characteristic pleasant odors (some is synthetic)
2- Vehicle: Solvents (usually ethanol and water mixture)
3- Fixtive: A substance used to reduce the evaporation rate and improve stability.
Benzoin
Glycerol

5. Chemical in foods: Food coloring:
It is color additive, is any dye, pigment or substance that imparts color when it is added to food or drink.
Orange B: allowed only for use in hot dog and sausage casings. 
Beta-Carotene: a yellow to orange colorant.

6. Chemical in foods: Preservation:
A preservative is a substance or a chemical that is added to products such as food, and many other products to prevent decomposition by microbial growth or by undesirable chemical changes.
Ex.:
NaNO3
Sod. benzoate

7. Chemical in foods: Antioxidant:
An antioxidant is a molecule that inhibits the oxidation of other molecules.
Oxidation is a chemical reaction that can produce free radicals, leading to chain reactions that may damage cells.
Ex.:
Dibutylhydroxytoluene (BHT)
Vitamin A , C and E

8. Chemical in foods: Sweeteners:
A sugar substitute is a food additive that provides a sweet taste like that of sugar while containing significantly less food energy.
Ex.:
Saccharine

9. Preparation of Saccharine

10. Soap and Detergents

11. Fat or Oil

12. Fatty acids

13. Fat or Oil

14. Fat or oil
Example of an unsaturated fat triglyceride. Left part: glycerol, right part from top to bottom: palmitic acid, oleic acid, alpha-linolenic acid. Chemical formula: C55H98O6

16. Soap
Soap is a salt of a fatty acid

17. Soaps are less effective in hard water, which is water that contains a significant concentration of Mg2+ and Ca2+ ions. These ions form precipitates with soap molecules, and this precipitate is often seen as a gray line on a bathtub or sink and is often called “soap scum”.

18. Surfactant (Detergents):
Surface Active Agent
Surfactants have amphiphilic structure:
Hydrophilic
Hydrophobic

19. Classification of surfactant
According to charges of head group:
1- Ionic
Anionic
Cationic
Amphoteric
2- Nonionic

20. Classification of surfactant
According to charges of head group:
1- Ionic
􀀹 anionic

21. Classification of surfactant
According to charges of head group:
1- Ionic
􀀹 Cationic

22. Classification of surfactant
According to charges of head group:
1- Ionic
􀀹 Amphoteric

23. Classification of surfactant
According to charges of head group:
2- Nonionic

27. Behavior of surfactants:
When a molecule with amphiphilic structure is dissolved in aqueous medium, the hydrophobic group distorts the structure of the water.
As a result of this distortion, some of the surfactant molecules are expelled to the surfaces of the system with their hydrophobic groups oriented to minimize contact with the water molecules.
Nonpolar tail
Polar head

28. Insecticide: An insecticide is a substance used to kill insects
Natural insecticides
Inorganic insecticides
Nicotine and Neem
Copper(I) cyanide
Organic insecticides
Aluminium phosphide
Garlic
Boric acid
Organic chemical compounds
Elemental Sulfur

29. Organic insecticides
DiChlorodiphenyl trichloroethane (DDT)

30. Insect repellents
Insect repellent is a substance applied to skin, clothing, or other surfaces which discourages insects
mosquito

31. Drugs Analgesics and antipyretics Analgesic drugs relieve pain.
Antipyretics are substances that reduce fever.
المسكنات ادوية تسكن الالم و لا تسبب فقدان الوعى

32. Aspirin (acetylsalicylic acid)
Used for more than 100 years
Treats mild to moderate pain
Antipyretic effect

33. Side Effects Gastrointestinal irritation and bleeding
Increases bleeding time
Tinnitus
Children: Reye’s syndrome

34. Paracetamol

35. Sulpha drugs
Sulfonamide (also called sulphonamide or sulpha drugs) areanti bacterial that contain the sulfonamide group
Sulphadiazine
sluphaguanidine

36. Antibiotics Penicillin Discovered in 1928 by Alexander Fleming.
Penicillin antibiotics were among the first medications
Widely used