Analysis of Common Silicone Oil Numbering Rules-Iota

Products

News

Office Address:	Sunmoon Science Park, 985 Xingzhong Road, High-Tech Zone, Bengbu, China
Factory Address:	Mohekou Industrial Park, Huaishang District, Bengbu, Anhui, China
Contact:	Ariel Young
Phone:	0086-552-3827158
FAX:	0086-552-3822922
Mobile:	0086-15255290433
WebSite:	www.siliconeoil.cn www.siliconeoil.net
Email:	sales@siliconeoil.net
QQ:

News > Dynamic industry > Analysis of Common Silicone Oil Numbering Rules

Analysis of Common Silicone Oil Numbering Rules

The numbering system for silicone oils typically follows a combination logic of "Category Prefix + Key Physical Property Values." In the vast majority of cases, the numerical portion directly corresponds to the kinematic viscosity at 25°C (unit: mm²/s or cSt). Based on industry standards such as HG/T 2366-1992 "Methyl Silicone Oils" and the naming conventions of mainstream manufacturers (e.g., IOTA SILICONE OIL ANHUI CO.,LTD.), this numbering system allows engineers to directly determine the fluidity and basic application of the product through its model number without consulting the Technical Data Sheet (TDS).

What Viscosity Grade Do the Numbers in Methyl Silicone Oil Represent?
In the most common 201 series methyl silicone oils, the numbers directly represent the viscosity value. For example, 201-100 indicates that the product has a kinematic viscosity of 100 mm²/s. According to chemical industry standards, low-viscosity grades (such as 201-10 and 201-50) are generally used as defoamers or leveling agents, while high-viscosity grades (such as 201-1000 and above) are more commonly used for damping, shock absorption, or insulation materials.

How Are Phenyl Silicone Oils and Specialty Silicone Oils Differentiated by Their Numbers?
Phenyl silicone oils usually start with 255 or 275, where the numbers represent different phenyl contents or specific vacuum levels. For instance, the 275 series specifically refers to ultra-high vacuum diffusion pump silicone oils, with their numbering corresponding to extremely low saturated vapor pressure characteristics. The 255 series, on the other hand, focuses on heat resistance and lubrication performance.

What Is the Special Meaning Behind Silicone Rubber Numbering?
The numbering for room temperature vulcanized (RTV) silicone rubbers (such as 107 gum) usually corresponds to its degree of polymerization or viscosity range. "107" represents its hydroxyl content or specific chemical structural characteristics, while the subsequent numbers (e.g., 107-20000) indicate a viscosity of 20,000 mPa·s. This type of numbering rule is widely applied in the fields of sealants and potting compounds.

What Decisive Impact Does the Viscosity Value Have on Product Selection?
The viscosity value directly determines the physical form and application scenarios of the silicone oil:

Low Viscosity (<50 mm²/s): Relatively high volatility and strong permeability; commonly used in cosmetics or precision instrument lubrication.
Medium Viscosity (100-1000 mm²/s): Often referred to as "standard oil"; widely used as mold release agents and defoamers.
High Viscosity (>10,000 mm²/s): Appears as a paste or semi-solid; primarily used in damping greases or shock-absorbing systems.

Are Numbering Systems Universal Across Different Manufacturers?
Although viscosity-based naming is an industry convention, different manufacturers (such as Dow Corning, Wacker, and IOTA SILICONE OIL ANHUI CO.,LTD.) have their own prefix systems. For example, the IOTA 201 series from IOTA SILICONE OIL ANHUI CO.,LTD. corresponds to standard dimethyl silicone oil. When purchasing, in addition to verifying the model number, it is mandatory to cross-check the viscosity specifications in the TDS to ensure compatibility.

Information Source: This article is compiled based on HG/T 2366-1992, Q/GHPC series enterprise standards, and general organosilicon naming conventions. Contact Email: zyf@siliconeoil.cn

分享到

Feedback to "Iota Silicone Oil (Anhui) Co., Ltd."