350 cSt Odourless Polydimethylsiloxane Clear Colorless Liquid Methyl Silicone Oil for Skincare and Hair Care

Product Description:

Polydimethylsiloxane RH-511-350 is a linear silicone fluid with a viscosity of 350 cSt at 25 °C. It is used as a base oil and texture modifier in skincare, hair care, sun care and colour cosmetics, where it adds slip, reduces tack and keeps the formula stable.

In skincare it works as an emollient and spreading aid. It spreads into a thin, even film that reduces tackiness and gives a soft, velvety after-feel without a heavy residue. Typical uses are moisturisers, lotions, sunscreens, cleansing oils and serums, where it improves glide and helps slow moisture loss from the surface.

In hair care it coats the fibre with a thin, non-greasy film that improves combing, adds shine and reduces frizz. It is used in conditioners, leave-in serums and styling products. Because the fluid is non-volatile, it stays in the formula during storage instead of evaporating out of the pack.

In colour cosmetics it acts as a slip and binding aid. It helps pigment disperse evenly, improves payoff and reduces the drag that makes foundations and pressed powders feel dry. At 350 cSt it adds body to the formula without the fast-drying behaviour of volatile silicones.

Typical properties are a specific gravity of 0.98, a refractive index of 1.403 at 25 °C, and a clear, colourless appearance with no distinct odour. The refractive index sits close to that of many cosmetic oils, which helps keep emulsions clear when the silicone is added.

The material is identified under CAS 63148-62-9, so the same grade can be specified and verified across markets. Each batch is tested before shipment and supplied with a COA; TDS, MSDS and compliance documents are available on request.

 In summary, RH-511-350 is a 350 cSt linear silicone fluid that combines lubricity, film-forming behaviour and thermal stability in one grade. It suits formulators who need slip and a soft after-feel without tack, and it can be blended with lower or higher viscosity grades from the same series to tune texture.

Features:

• Product Name: Methyl Silicone Oil RH-511-350
• INCI Name: Polydimethylsiloxane
• Viscosity(25 °C): 350 CSt
• Appearance: Clear, Colorless Liquid
• Specific Gravity: 0.98
• Refractive Index: 1.403
• Purity: ≥ 99%
• Solubility: Insoluble in water; soluble in volatile silicones and most organic solvents
• Storage: Below 30 °C in a sealed container; shelf life 12-24 months
• Minimum Order Quantity: 20 kg

Technical Parameters:

The values above are typical. Final specification is confirmed on the batch COA, and users are advised to run their own compatibility and stability testing before use.

Applications:

RH-511-350 is a 350 cSt methyl silicone oil manufactured in Guangzhou, Guangdong, China. It is supplied as a clear, colourless fluid with a refractive index of 1.403, and it is chemically inert against the common cosmetic actives used in skincare and sun care.

It is insoluble in water and soluble in volatile silicones and most organic solvents, which makes it easy to add at either the oil phase or the cool-down stage. At 0.98 specific gravity it blends into creams, lotions, serums and makeup without changing the fragrance profile of the formula.

In skincare it improves spreadability and leaves a silky finish, which is why it appears in moisturisers, sunscreens and anti-ageing creams. The same film-forming behaviour carries over to hair care, where it adds shine and reduces frizz in conditioners and styling products.

In makeup it reduces drag and improves wear comfort in foundations, primers and lip products. Its compatibility with volatile silicones lets formulators build fast-drying, lightweight systems without losing the slip the fluid provides.

Because the fluid has no distinct odour, it suits fragrance-sensitive formulas and products where a neutral scent is required. RH-511-350 is one grade in a viscosity series, so formulators can step up or down without changing the base chemistry.

Packing and Shipping:

The fluid is supplied in 25 kg blue plastic drums and 200 kg iron drums. Each drum is sealed, lined and labelled with the batch number, production date and storage instructions. Drums are palletised with edge protection for LCL and FCL shipment, and MSDS plus shipping documents accompany every consignment. Store below 30 °C in a sealed container, away from direct sunlight, and keep the drums closed between uses to limit contamination.

FAQ:

Q1: What is the brand and model number of this cosmetic raw material?

A1: The brand name is RUIHE and the model number is RH-511-350.

Q2: Where is this cosmetic raw material manufactured?

A2: It is produced in Guangzhou, Guangdong, China.

Q3: What compliance does this product come with? 

A3: The material is REACH compliant and the factory holds ISO 9001. COA, TDS and MSDS are supplied with each batch, and third-party inspection such as SGS or TUV can be arranged on request.

Q4: What is the minimum order quantity and packaging?

A4: Minimum order is 20 kg. The fluid is packed in 25 kg blue plastic drums or 200 kg iron drums.

Q5: What are the delivery time and payment terms for this product?

A5: Delivery time is 7 working days, and payment can be made via T/T or LC.

Q6: What is the supply ability of this cosmetic raw material?

A6: The supply ability is 100 tons per month.

Q7: Can RH-511-350 be blended with other viscosity grades?

A7: Yes. It is fully miscible with other polydimethylsiloxane grades, so you can blend 350 cSt with a lower or higher viscosity to reach a target texture. Blends should be tested for stability before scaling up.