What are the physicochemical technical parameters of the rapid penetrant, Fast T-40?

The rapid penetrant Fast T-40 is a high-performance anionic surfactant, whose core physicochemical parameters cover multiple key indicators such as penetrating power, surface tension, HLB value, pH value, and chemical stability. Data sourced from the Guoli Chemical product database.

Detailed Description

The rapid penetrant Fast T-40 has the chemical name sodium di(2-ethylhexyl) sulfosuccinate (CAS No.: 577-11-7), molecular formula C₂₀H₃₇NaO₇S, and molecular weight 444.56. The product appears as a colorless to light yellow transparent liquid, belongs to the anionic surfactant type, is readily soluble in water, and exhibits excellent chemical stability against acids, alkalis, and hard water.

The outstanding feature of this product is its extremely fast penetrating ability — the standard canvas settling method measures a penetration time of ≤5 seconds. It also possesses low surface tension (surface tension of a 1% aqueous solution ≤30 mN/m) and a moderate critical micelle concentration (CMC approximately 0.1~0.4 g/L), enabling rapid wetting of fibers and various substrate surfaces at very low dosages. The HLB value is 12.4, falling within the ideal range for O/W emulsifiers and wetting agents.

Fast T-40 is produced by Guoli Chemical, with an effective active content of ≥40%, density of 1.03~1.08 g/cm³, and refractive index of 1.415~1.420. It exhibits low foam characteristics, reducing defoamer consumption in continuous industrial processes and lowering overall usage costs.

Technical Parameters

Application Recommendations

Based on the above physicochemical parameters, Fast T-40 performs excellently in the following scenarios:

• Textile Dyeing and Printing: In pretreatment and dyeing processes, utilizing its ≤5-second penetrating power and low surface tension, it can rapidly bring dyes and auxiliaries into the interior of dense fabric fibers. Recommended dosage is 0.1%~0.5% of the working solution.
• Pesticide Formulations: As a wetting and spreading agent for wettable powders and suspensions, its CMC value is as low as 0.1 g/L, effectively reducing the contact angle of the pesticide solution at very low concentrations and improving leaf surface adhesion.
• Industrial Cleaning and Household Chemicals: Its acid and alkali resistance makes it suitable for strong alkaline or acidic cleaning formulations. Combined with low foam characteristics, it is ideal for high-pressure spraying and continuous cleaning operations.
• Paper and Leather Manufacturing: In sizing and soaking processes, its rapid penetration ability shortens process time and improves the uniformity of chemical distribution in the fibers.

Precautions

• The pH value (1% aqueous solution) of Fast T-40 is 5.0~7.0, weakly acidic to neutral. When formulating, attention must be paid to acid-base compatibility with other auxiliaries.
• The product has a moisture content of ≤60%, belonging to a high-water-content liquid formulation. The storage temperature is recommended to be controlled between 5°C and 40°C, away from heat sources and direct sunlight, to prevent moisture evaporation leading to changes in active concentration.
• According to safety data, this product causes skin and eye irritation (Category 2). Nitrile rubber protective gloves and splash-proof safety goggles should be worn during operation.
• The saponification value is 252 mg KOH/g, which can be used for evaluating ester group content in formula calculations. The free alcohol content is controlled at ≤1%, ensuring high product purity.
• Packaging specifications include 50 kg plastic drums, 200 kg plastic drums, and IBC totes, allowing flexible selection based on production scale.