Ammonium Hydroxide, often criticized and misunderstood, is a key ingredient in many hair products, especially permanent dyes. This article delves into its chemistry, uses, benefits, risks, and environmental impact, offering a complete analysis of its role in the cosmetics industry.
Author:
Vegetable Keratin: What This Term Really Hides Behind the INCI Chemistry
«Vegetable keratin» does not exist biochemically: it refers to hydrolyzed wheat, soy, or corn proteins, poor in cysteine and therefore unable to reconstitute disulfide bonds. Hairswiss clarifies the difference from animal keratin and explains what these actives actually do on the fiber.
Argan Oil: Fatty Acid Chemistry, Antioxidants and Professional Use
Argan oil is distinguished by its unique fatty acid profile (ω-9 oleic ~46%, ω-6 linoleic ~33%), its high-concentration tocopherols, and specific phytosterols (schottenol, spinasterol). Hairswiss analyzes its chemistry and role in professional hair formulations.
Sodium C14-16 Olefin Sulfonate: Chemistry, Safety and Professional Shampoos
Sodium C14-16 Olefin Sulfonate is a synthetic anionic surfactant obtained by sulfonation of C14–C16 alpha-olefins. Its amphiphilic structure gives it high detergency and excellent performance in hard water, with a lower irritation profile than SLS. Hairswiss analyzes its molecular chemistry, surfactant properties and role in professional shampoos.
Denatured Alcohol in Hair Care: Chemistry, Risks and Professional Guide
Denatured Alcohol (Alcohol Denat., ethanol C2H5OH, MW 46 Da) is a short-chain, volatile and water-miscible alcohol whose drying effect on the hair fiber results from the solubilization of intercuticular lipids and surface water entrainment by evaporation. Hairswiss analyzes its chemistry, problematic concentration thresholds and professional formulation alternatives.
Lavender Oil for Hair: Anti-Frizz Chemistry and Scalp Benefits
Lavender essential oil (Lavandula angustifolia) is a multifunctional active in hair cosmetology: its terpene esters — primarily linalyl acetate (MW 196 Da, ~40–50%) and linalool (MW 154 Da, ~25–35%) — exert an anti-inflammatory action on the scalp, a mild antimicrobial and an antistatic effect on the fiber. Hairswiss analyzes the exact chemistry and mechanism of action on the hair structure.
Hydrolyzed Keratin and Macadamia Oil: Molecular Complementarity on the Hair Fiber
Hydrolyzed keratin (peptides 300–10,000 Da) and macadamia oil (60–85% palmitoleic acid ω-7, rare in cosmetics) form a complementary formulation association: the protein fills cuticle gaps, the oil reconstitutes the surface lipid film. Hairswiss analyzes their mechanisms of action and synergy on degraded hair fibers.
Prebiotics and Probiotics for the Scalp: Microbiome, Composition and Mechanisms of Action
The scalp microbiome — dominated by Malassezia, Cutibacterium and Staphylococcus epidermidis — regulates local pH, sebum production, and the cutaneous barrier. Prebiotics (fructooligosaccharides, inulin) selectively feed beneficial bacteria; probiotic lysates (Lactobacillus ferment) act on TLR receptors of the epidermis. Hairswiss analyzes the molecular mechanisms and the limits of these actives in cosmetic formulation.
Boar Bristles in Hair Brushes: Role in Sebum Distribution and Friction on the Hair Fiber
Boar bristles, with a diameter of 50–80 µm and a scaly surface that mimics the hair cuticle, mechanically distribute sebum from the roots to the lengths, reducing tip dryness without any product addition. Hairswiss analyzes the physics of brushing and the interaction between bristle fibers and the hair fiber.
Blue-Violet Pigments in Neutralizing Shampoos: Chemistry of Chromatic Subtraction on Bleached Hair
Blue-violet pigments in neutralizing shampoos work by color subtraction: crystal violet or anthraquinone molecules (maximum absorption at 580–600 nm) neutralize the yellow-orange reflections (580–600 nm) of bleached hair through light interference. Hairswiss explains the chemistry of direct pigments and their deposition mechanism on porous fibers.
Para-phenylenediamine: The Chemical Ingredient that Colors Hair
Para-phenylenediamine (PPD, MW 108 Da) is a primary aromatic amine used as an oxidative pigment precursor in permanent hair dyes. Its small molecular size allows it to penetrate the hair cortex, where it couples with couplers under hydrogen peroxide action to form large colored molecules. It is also one of the most frequent contact allergens in cosmetics — through T-lymphocyte sensitization. Hairswiss analyzes its chemistry, coloring mechanism and documented dermatological risks.
Artificial Intelligence and Professional Hair Care Distribution: What Changes for Hairdressers
The introduction of artificial intelligence into the distribution of professional hair care products is shifting the selection criterion: from commercial relationships toward formulatory transparency. Hairswiss analyzes how algorithmic recommendation systems process INCI data, cosmetic functions, and chemical compatibility — and what this changes concretely for Swiss hairdressers.
Hair Gel: Polymer Chemistry, Hold Mechanism and Professional Guide
Hair gel is an aqueous polymeric formulation — typically acrylates, PVP or carbomers — that creates a flexible hold film on the hair fiber as it dries. Hold level depends directly on polymer concentration and molecular weight. Hairswiss analyzes the exact chemistry, the deposition mechanism on the cuticle and the professional selection criteria based on fiber type and desired result.
Scalp Care Products: Skin Barrier Chemistry and Professional Actives
The scalp is a distinct ecosystem: its pH (4.5–5.5), hydrolipidic film, and specific microbiome differentiate it from facial skin. Effective actives — zinc PCA, salicylic acid, ceramide complexes, growth factors — act on distinct molecular targets depending on the dysfunction being treated. Hairswiss analyzes scalp formulations and professional selection criteria.
Organic and Bio Hair Care Products: Certifications, Formulation and Comparison with Conventional Formulas
Organic or bio hair care products are not a homogeneous chemical category: they are defined by certification frameworks (COSMOS, Ecocert, NATRUE) that impose naturalness thresholds and plant-origin requirements on ingredients. Hairswiss explains what these certifications concretely imply for formulation and analyzes performance differences compared to conventional formulas.
LAURAMIDOPROPYLAMINE OXIDE: A Key Ingredient in Hair Care
Lauramidopropylamine Oxide is an amphoteric surfactant derived from lauric acid (C12) — a tertiary amine oxide that adopts a cationic charge at acid pH and anionic charge at alkaline pH. This amphoteric nature gives it remarkable compatibility with anionic surfactants (SLS, SLES), reducing their cuticular irritation and improving formulation viscosity. Hairswiss analyzes its chemistry, conditional foaming mechanism and role in professional shampoos.
Summer Hair Protection: UV, Chlorine and Sea Salt — Degradation Mechanisms and Protective Actives
In summer, three chemical agents act simultaneously on the hair fiber: UV radiation (photo-oxidation of melanin and protein chains), chlorine (oxidizing agent that degrades disulfide bonds), and sea salt (high hygroscopicity that fragments dry cuticles). Hairswiss explains the degradation mechanisms and relevant protective actives.
The Three Hair Types: Molecular Basis of Hair Fiber Curvature and Formulation Implications
Hair types (straight, wavy, curly) are not an aesthetic classification: they reflect the elliptical shape of the follicle and the asymmetric distribution of disulfide bonds in the cortex. This geometry directly influences porosity, mechanical resistance, and response to cosmetic actives. Hairswiss explains the molecular basis of hair curvature and its implications for formula selection.
Cyclomethicone: Chemistry of Volatile Silicones, Evaporation Mechanism and Role in Hair Formulation
Cyclomethicone is a light cyclic silicone (D4: MW 296 Da, D5: MW 370 Da, D6: MW 444 Da) with high volatility: it evaporates completely within 30–60 seconds of application, leaving no residue on the hair fiber. This property distinguishes it from heavy silicones (dimethicone) and makes it the preferred carrier for light styling actives. Hairswiss analyzes its chemistry, evaporation mechanism and the regulatory questions surrounding D4 and D5.
Professional vs Consumer Hair Products: Differences in Active Concentration and Formulation
Professional products used in salon differ from consumer ranges in active concentration, formulation precision, and fiber deposition technology. A professional conditioner typically contains 3–5% BTAC versus 0.5–1% in consumer versions. Hairswiss analyzes concrete formulation differences and explains why active concentration determines the result.