Requirements of perfumes

Question 1

Four factors that affects the volume of use of fragrance ingredients;

Answer 1

1. Odour contribution
2. stability
3. performance & safety
4. Cost

Question 2

Main stability issues: name 3

Answer 2

oxidation, contamination, reactions with other perfume ingredients.

Question 3

Ways to overcome stability: name 5

Answer 3

Chelating agents, UV absorbers, antioxidants, dark container, spray dispenser.

Question 4

types of stability testing: name 3

Answer 4

elevated temperatures, humanity, exposure to UV

Question 5

Formulation assed on odour and physical appearance: name 3 parameters?

Answer 5

discolouration, precipitation, changes in viscosity.

Question 6

Fragrance in soap

Answer 6

substitution from alcohol based fragrance. problems with discolouration.

Question 7

Fragrance in shampoo

Answer 7

discolouration and performance. Retention in dry hair depends on type of surfactant.

Question 8

Fragrance in shower gels

Answer 8

discolouration and performance. Diffusion to water and bath, retention to body.

Question 9

Oral toxicity measured by

Answer 9

LD50

Question 10

define neurotoxicity

Answer 10

will a compound penetrate the skin and effect nervous system.