The chemical nature of Fast T-70B is dioctyl sodium sulfosuccinate (CAS: 577-11-7), belonging to the 'gemini' structure of anionic surfactants—the molecule has two octyl hydrophobic chains and two hydrophilic groups (sulfonate + carboxylate ester). This unique dual-tail structure allows it to arrange very tightly at the oil-water interface, efficiently reducing interfacial tension. Compared to common single-chain anionic surfactants (such as sodium dodecylbenzene sulfonate LAS, sodium fatty alcohol sulfate SDS) or nonionic penetrants (such as JFC series), the penetrating power of Fast T-70B is in a different league—its canvas settlement penetration time is only ≤5 seconds, while ordinary nonionic penetrants are typically in the 10-60 second range, which is its most proud 'fast' hallmark.
Within the product matrix of the rapid penetrant T series from Guoli Chemical, Fast T-70B is positioned as a cost-effective high-concentration model. Compared to the low-concentration models Fast T-40 (~40% active) and Fast T-50 (~50% active), Fast T-70B with ≥70% high active content offers significant advantages in unit transportation cost, storage space, and dosing efficiency; compared to the higher concentration Fast T-75A (~75% active), Fast T-70B provides a more competitive price balance while ensuring equally excellent penetration performance. Compared to phosphate ester penetrants (such as alkali-resistant penetrant AEP, OEP-70), Fast T-70B has faster penetration speed and also possesses excellent emulsifying and dispersing capabilities. In cleaning and pesticide formulation scenarios requiring 'penetration + emulsification' synergy, it can often replace compounding schemes when used alone.
Another non-negligible advantage is wide working condition adaptability and low foam characteristics. Fast T-70B maintains excellent chemical stability in acid, alkali, and hard water media, allowing it to perform stably under harsh conditions such as strong alkali mercerization, acidic metal pickling, and high-hardness water industrial cleaning. At the same time, unlike some nonionic penetrants that tend to produce a lot of foam and affect continuous production, Fast T-70B is a low-foam product, especially suitable for processes with strict foam control requirements such as spray cleaning and high-pressure jet dyeing. Combined with its moderate HLB value of 10-13, it can serve both as a pure penetrating wetting agent and as an auxiliary emulsifier, truly achieving 'one specialty, multiple functions'.
| Parameter | Fast T-70B | Comparison with Similar Products |
|---|---|---|
| Chemical Name | Dioctyl sodium sulfosuccinate (DOSS) | Fast T-40/Fast T-50 and same series, all are DOSS; JFC series are nonionic fatty alcohol polyoxyethylene ethers |
| Ion Type | Anionic | Different from JFC series (nonionic), compatibility requires consideration of charge matching |
| Active Content | ≥70.0% | Higher than Fast T-40 (~40%), Fast T-50 (~50%), slightly lower than Fast T-75A (~75%) |
| Penetration (Canvas Settlement) | ≤5 seconds | JFC-1 typically 15-60 seconds; phosphate ester penetrants typically 10-30 seconds |
| Surface Tension (1% Aqueous Solution) | ≤30 mN/m | Common anionic penetrants usually 30-40 mN/m |
| HLB Value | 10-13 | Moderate range, combining wetting and emulsifying functions |
| Foam Characteristics | Low foam | Significantly better than the high-foam tendency of common nonionic penetrants |
| Chemical Stability | Resistant to acid, alkali, and hard water | Soap-based penetrants are not resistant to acid/hard water; some nonionics are not resistant to strong alkali |
| pH (1% Aqueous Solution) | 5.0-7.0 | Close to neutral, minimal pH interference with the system |
| Appearance | Colorless to light yellow transparent viscous liquid | High concentration natural color, suitable for use in transparent formulation systems |
| CMC (Critical Micelle Concentration) | Approx. 0.68 g/L | Low CMC value indicates optimal effect can be achieved at low dosages |
Based on the outstanding advantages of Fast T-70B, the following scenarios best utilize its value: