Persil Free & Sensitive Ultra Concentrated Detergent

This is a high-performance, enzyme-rich liquid laundry detergent engineered with a multi-surfactant cleaning matrix and advanced stain-fighting polymers to deliver exceptional cleaning power across everyday fabrics.

Performance Rating: 9.5

The formulation earns an exceptionally high performance evaluation due to its heavy-duty surfactant system paired with an advanced multi-enzyme cocktail. The combination of sodium C10-16 alkylbenzenesulfonate, sodium laureth sulfate, and laureth-12 provides superior lifting of greasy soils, body oils, and particulate matter. Stain-removal efficacy is further elevated by protease, amylase, mannanase, and cellulase enzymes, which target complex protein, starch, and food gum residues while smoothing fabric fibers. Additionally, tetrasodium iminodisuccinate acts as an effective chelating agent to soften water, alkoxylated polyethyleneimine prevents soil redeposition, and disodium distyrylbiphenyl disulfonate delivers noticeable optical fabric brightening across wash cycles.

Safety Rating: 8.1

The safety profile is solidly favorable, benefiting from modern, biodegradable builders and a well-balanced formulation. The presence of tetrasodium iminodisuccinate provides an environmentally responsible, low-toxicity chelating alternative to legacy agents. While concentrated surfactants like sodium C10-16 alkylbenzenesulfonate and sodium laureth sulfate can present mild skin and ocular irritation potential prior to dilution, they rinse out cleanly. Mild watchouts stem from MEA-borate and sodium metaborate, used for enzyme stabilization, as well as the sensitizing potential of active enzymes during direct chemical exposure. Overall, the absence of aggressive preservatives and harsh volatile chemicals keeps consumer risk very low when used as directed.

Final Rating: 9.0

The detergent secures an outstanding overall assessment by successfully pairing professional-grade cleaning power with a commendable toxicological profile. Its sophisticated blend of diverse surfactants, four specialized cleaning enzymes, and anti-redeposition polymers ensures top-tier performance against virtually all common household stains and fabric dullness. At the same time, the inclusion of biodegradable chelators and well-tolerated processing solvents keeps environmental impact and household irritation risks well-managed. Balancing robust stain removal, fabric maintenance, and user safety, this liquid detergent stands out as a reliable, high-tier workhorse formula for demanding daily laundry needs across various water conditions.

Verdict

The formulation is built upon a robust multi-surfactant matrix combining sodium C10-16 alkylbenzenesulfonate, sodium laureth sulfate, and laureth-12. This synergy of anionic and nonionic surfactants effectively targets particulate grime, body oils, and stubborn grease. Paired with fatty acid soaps and tetrasodium iminodisuccinate—a modern, biodegradable chelating agent that neutralizes hard water minerals—the surfactant base ensures active cleaning power is maintained across various water temperatures, lifting heavy soils without leaving behind greasy residues.

What elevates this formula into a heavy-duty stain remover is its comprehensive quad-enzyme cocktail. The targeted combination of protease, amylase, mannanase, and cellulase works in unison to break down complex organic stains at a molecular level. Protease dissolves difficult protein deposits such as blood and sweat, while amylase digests starchy food residues. The addition of mannanase eliminates sticky food thickeners and sauces, while cellulase smooths fabric fibers to prevent micro-pilling and color fading.

Beyond basic cleaning, the formula incorporates alkoxylated polyethyleneimine and a hydrophobically modified acrylate copolymer. These specialized cleaning polymers act as soil-suspending and anti-redeposition agents, locking lifted dirt in the wash water so it rinses away cleanly rather than settling back onto garments. To maintain fabric radiance, disodium distyrylbiphenyl disulfonate functions as a potent optical brightener, converting invisible ultraviolet light into visible blue light to counteract fabric dullness and yellowing over repeated washes.

Overall, this detergent represents a top-tier laundry solution designed for demanding household messes and heavy soil loads. Because it excludes added perfumes and dyes, it minimizes irritation risks for those sensitive to scents while preserving uncompromised stain-fighting strength. However, consumers washing delicate protein fibers like wool or silk should avoid it, as the protease enzymes will gradually degrade natural animal hairs. For everyday cottons, linens, and synthetics, it provides superior fabric care and deep cleaning efficacy.

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Ingredient Evaluation

📁 Surfactants / 表面活性剂

🧪 Sodium C10-16 Alkylbenzenesulfonate / C10-16 烷基苯磺酸钠

Purpose: Primary anionic surfactant that provides powerful cleaning and removal of oily and particulate soils.

Concerns: Can cause skin and eye irritation in concentrated forms.

Notes: A linear alkylbenzene sulfonate (LAS) derivative, which is one of the most widely used synthetic laundry surfactants.

🧪 Sodium Laureth Sulfate / 月桂醇聚醚硫酸酯钠

Purpose: Anionic surfactant that enhances foaming, soil emulsification, and wetting performance.

Concerns: May cause mild skin irritation; manufacturing involves ethoxylation which requires monitoring for trace 1,4-dioxane.

Notes: More tolerant of hard water minerals and milder on skin than sodium lauryl sulfate (SLS).

🧪 Laureth-12 / 月桂醇聚醚-12

Purpose: Non-ionic surfactant that emulsifies greasy stains and helps suspend dirt in the wash water.

Concerns: Ethoxylated ingredient that may contain trace 1,4-dioxane if not properly stripped.

Notes: Provides excellent detergency across cold and warm wash temperatures without generating excessive foam.

🧪 Fatty Acids, C8-18 and C18-Unsaturated Sodium Salts / C8-18 及 C18 不饱和脂肪酸钠盐

Purpose: Functions as a soap surfactant for dirt removal and acts as a built-in suds suppressor.

Notes: Helps control foam volume to make the detergent suitable for high-efficiency (HE) washing machines.

📁 Solvents / 溶剂

🧪 Water / 水

Purpose: Acts as the primary carrier and solvent to dissolve and uniformly disperse all formula components.

Notes: Deionized or purified water is standard in liquid detergents to prevent mineral interference.

🧪 Propylene Glycol / 丙二醇

Purpose: Functions as a co-solvent, viscosity modifier, and enzyme stabilizer in the liquid matrix.

Notes: Forms temporary stabilizing complexes with borate to protect enzymes during storage.

🧪 Alcohol Denat. / 变性乙醇

Purpose: Acts as a solvent and thinning agent to adjust formula viscosity and aid ingredient dissolution.

Concerns: Flammable in bulk storage; can cause skin dryness upon prolonged direct exposure.

Notes: Ethanol denatured with bittering additives to prevent accidental or intentional ingestion.

📁 Active Ingredients / 活性成分

🧪 Protease Enzyme / 蛋白酶

Purpose: Catalytically hydrolyzes protein-based stains such as blood, grass, sweat, and egg into soluble peptides.

Concerns: Can act as a respiratory sensitizer in powdered industrial forms, though liquid/encapsulated formats are safe for consumers.

Notes: One of the most essential and common stain-fighting enzymes used in modern liquid detergents.

🧪 Amylase Enzyme / 淀粉酶

Purpose: Breaks down complex carbohydrates and starch-based stains such as pasta sauces, gravy, and baby food.

Notes: Remains highly effective at lower wash temperatures, enabling energy-saving cold-water washing.

🧪 Mannanase Enzyme / 甘露聚糖酶

Purpose: Degrades mannan-based food gums (e.g., guar gum, locust bean gum) found in ice cream, salad dressings, and cosmetics.

Notes: Targets sticky gum residues that trap dirt and cause dinginess over repeated wash cycles.

🧪 Cellulase Enzyme / 纤维素酶

Purpose: Cleaves damaged microfibrils from cotton fabrics to prevent fuzzing, reduce pilling, and brighten colors.

Notes: Provides both fabric-care and cleaning benefits by releasing particulate soils trapped in damaged fibers.

📁 Chelating Agents / 螯合剂与稳定剂

🧪 Tetrasodium Iminodisuccinate / 四亚氨基二琥珀酸钠

Purpose: Biodegradable chelating agent that sequesters calcium and magnesium ions to soften water and boost surfactant efficiency.

Notes: An eco-friendly, readily biodegradable alternative to conventional aminopolycarboxylate chelators like EDTA and NTA.

🧪 Polyethyleneimine Alkoxylated / 烷氧基化聚乙烯亚胺

Purpose: Soil-release and anti-redeposition polymer that prevents loosened dirt and grease from re-settling onto fabrics.

Notes: Particularly effective at enhancing cleaning performance on synthetic polyester and cotton-blend textiles.

🧪 MEA-Borate / 乙醇胺硼酸盐

Purpose: Functions as a reversible enzyme inhibitor to preserve enzyme stability in the bottle and provides pH buffering.

Concerns: Boron-containing compounds face regulatory scrutiny in certain regions regarding potential reproductive toxicity at high dosages.

Notes: Reversibly binds to enzymes in the concentrated liquid and dissociates upon dilution in the wash cycle to reactivate them.

🧪 Sodium Metaborate / 偏硼酸钠

Purpose: Serves as an inorganic builder, pH buffer, and synergistic enzyme stabilizer.

Concerns: Subject to concentration limits in some jurisdictions due to classification of borates.

Notes: Works in tandem with glycols to stabilize proteolytic enzymes against autodigestion.

🧪 Hydrophobically Modified Acrylate/Styrene Copolymer / 疏水改性丙烯酸酯/苯乙烯共聚物

Purpose: Acts as an opacifying polymer that provides an aesthetic opaque/creamy appearance and assists in soil dispersion.

Notes: Typically added at low concentrations (<1%) solely to modify optical properties and aesthetic texture.

🧪 Disodium Distyrylbiphenyl Disulfonate / 二苯乙烯基联苯二磺酸二钠

Purpose: Fluorescent whitening agent (optical brightener) that absorbs UV radiation and emits visible blue light to make fabrics look brighter.

Concerns: Has low aquatic biodegradability, although it is considered safe for humans and the environment at detergent use levels.

Notes: Commonly known as Tinopal CBS-X; offers higher light fastness and chlorine resistance compared to traditional stilbene brighteners.