1,3-butylene Glycol/1,3 butanediol

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Ordinary moisturizer 1,3-Butylene Glycol 

Safety
Generally, the innocuousness of 1,3 Butylene Glycol as a skin contact substance 
has been described in many publications. It is tolerated practically without irritation, 
even over longer periods of time. The CIR panel concludes, that 1.3 Butylene Glycol 
in the concentration usually applied in cosmetics can be recognized as safe.
Acute toxicity LD50 (oral)
No-effect level:
rat:   18.610 mg/Kg 29.4 ml/kg Kg /other literature source 
mouse:12.980 mg/Kg  1500 mg/Kg

Functions
1,3 Butylene Glycol is a solvent and in general an alternative whenever 
Propylene Glycol or Glycerol are used with mostly superior properties both 
with regard to its technological properties as well as biological effects

Technological functions
1,3 Butylene Glycol is a viscosity decreasing component. Like other humectants, it forms a 
barrier which prevents the drying out of cosmetics. Furthermore, it prevents the assimilation of 
water from atmospheres of high humidity into film-forming preparations. Butylene Glycol 
prevents crystallization of insoluble components in cosmetic vehicles.

Moreover, it aids in solubilising aqueous insoluble ,ingredients. It has a solubilising effect on natural 
and synthetic flavouring substances. Among the ,most important characteristics of this ingredient 
are its ability to stabilise volatile compounds such as fragrances and flavours fixing them in cosmetic 
formulations and to retard the loss of aroma.

Storage and Packing:  

Butylene glycol is a chemical compound (1,3-butanediol)—a colorless organic alcohol used in the following ways:

       1.as a solvent (helps other products dissolve in water),

       2.as a viscosity-decreasing agent (to thin creams and gels so they’re easier to use),

       3.and as a conditioning agent.

You can find it listed on the product labels of hair care products, moisturizers, foundations, sunscreens, eye creams, mascaras, and more. It’s also used as a food additive to add flavoring—it has a sweet flavor and a bitter aftertaste—and in the manufacture of polyester plasticizers, structural material for boats, custom moldings, and sheets and boards for construction.

When placed on the skin or ingested, butylene glycol is absorbed and broken down into “gamma-hydroxybutryic acid,” a naturally occurring compound found in humans. The Cosmetic Ingredient Review (CIR), the FDA, and the World Health Organization have all found butylene glycol to be safe.

Does Butylene Glycol Cause Harm to Skin?

Manufacturers of skin care products use butylene glycol because it works as a humectant. It has the ability to take moisture from the air and retain it, keeping the product from drying out and making the formulation more resistant to high humidity. According to the Environmental Protection Agency (EPA), about 10 percent of the total production of the chemical goes into personal care products.

In sensitive individuals, butylene glycol may be irritating to the skin, eyes, and or nasal passages, but it is the least potentially irritating of all the glycols. In addition, since this ingredient is in so many of the products we apply on our skin every day, the concern is that over time, our exposure may be adding up to something that could be potentially harmful to the health of the skin and body. So far, however, scientific studies have shown no harmful effects from the ingredient at current levels and exposures. In fact, this glycol has not been linked to any organ-specific toxicity and is not considered to be carcinogenic, unlike ethylene glycol.

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