跳至主要内容

Is silicone oil safe?

Is silicone oil safe?

From a physiological point of view, polysiloxane is one of the polymers with the lowest known activity. The results of toxicological studies suggest that dimethyl silicone oil, which removes low-boiling substances, is non-toxic and can be used in large amounts in food,

cosmetics, and pharmaceuticals. The LD50 value (50% lethal amount) of the lethal dose of dimethyl silicone oil is more than 35g/Kg. This value is classified according to the toxicity of the American Industrial Hygiene Association, which is equivalent to non-toxic; it also has no chronic poisoning problems and will not be absorbed by the digestive system. No irritation to the membrane; low viscosity dimethyl silicone oil has slight irritation to the cornea, but no harm.

Safety data of silicone oil as follow:

Types of silicone oil

Viscosity (25°C/mm2Ÿs)

Skin irritation (human)

Chronic toxicity (rat, 6 months)

Acute toxicity LD50 (rat, administered orally)

Eye irritation (Japanese white rabbit)

Methyl hydrogen silicone oil

5

Quasi-negative

---

>33ML/kg

Very slight

10

Negative

No abnormality [input amount 10mL/(kg·d)]

---

---

20

---

---

>50g/kg

---

100

Negative

---

---

---

Methyl phenyl silicone oil (phenyl mole fraction 25%)

20

Quasi-negative

---

>33ML/kg

Very slight

Methylphenyl silicone oil (phenyl mole fraction 50%)

400

---

---

30g/kg

---

Methyl hydrogen silicone oil

---

---

---

>33ML/kg

---

*  No effect on cornea; slight inflammation on conjunctiva, but less irritating than normal detergent.

It should be noted that the production method and production environment of silicone oil affect the purity of silicone oil (including low-molecular-weight siloxanes remaining in the silicone oil, catalyst decomposition, neutralization residues and impurities brought into the production environment). For medicine, food and cosmetics, special grade silicone oil should be used. At present, the country has promulgated the National Food Safety Standard for Food Additives Dimethicone and Its Emulsions (GB 30612-2014). Special grade silicone oil for production license.

https://www.linkedin.com/company/china-defoamer

https://invelydefoamer.blogspot.com/

https://www.facebook.com/invelychem/


标签：

评论

发表评论

此博客中的热门博文

The magical effect of fumed silica in silicone rubber

The magical effect of fumed silica in silicone rubber Fumed silica is one of the most important high-tech ultra-fine inorganic new materials. Due to its small particle size, it has a large specific surface area, strong surface adsorption, large surface energy, high chemical purity, good dispersion performance, thermal resistance, It has specific properties in terms of electrical resistance, etc. Its superior stability, reinforcement, thickening and thixotropic properties are unique in many disciplines and fields and have an irreplaceable role. Today, Xiaobian will work with you to learn how to apply fumed silica in silicone rubber. Application of fumed silica in high temperature vulcanization (HTV) silicone rubber The use of fumed silica can be divided into silicone materials and other fields, in which the amount of silica in the silicone material is nearly 60%, and the silicone rubber is the most used material in the silicone material. It can be added in an amount of up to 50% ...
1 条评论
阅读全文

How do we assess antifoam efficiency ?

How do we assess antifoam efficiency ? Quality of an antifoam is given by two main characteristics : • Knockdown ability or shock effect :Meaning the speed to destroy an existing foam. • Persistence or durability : Meaning the efficiency over time.   These two parameters can be assessed by several tests. The main test is the bubbling method. A graduated column with a glass frit in the bottom is required. Foaming water is poured in the column and air at constant flowrate is introduced through the glass frit in the column. Foam is generated by the air and starts to travel up the column. At a determined level of foam, antifoam is injected. By this method several antifoaming agents can be tested. A graph reporting foam height vs time is very helpful to establish the knockdown ability and the persistence for each product. The selected antifoam is the product with the best compromise between shock effect and durability       Environmental performance   Silicone antifo...
1 条评论
阅读全文

Why is there foam in the paint and coating? What we should do to eliminate foam?

Why is there foam in the paint and coating? What we should do to eliminate foam?             check below details:           Surface tension The surface tension of the coating has a great influence on the defoaming agent.  The surface tension of the defoaming agent must be lower than the surface tension of the coating. Otherwise, there is no defoaming and foam suppression. The surface tension of the coating is a variable factor, so a constant surface tension is required when using the defoamer, and then the surface tension variation factor is taken into account. The influence of other additives Surfactants used in coatings are mostly functionally incompatible with defoamers. In particular, emulsifiers, wetting and dispersing agents, leveling agents, thickeners, etc., have an effect on the effect of the antifoaming agent. Therefore, we must pay attention to ...
发表评论
阅读全文