Rainbath® Refreshing Shower and Bath Gel - Original - 16 oz

DESCRIPTION

What It Does: Adjusts ph to optimal ranges, chelates destabilizing metal ions, provides mild exfoliation at higher concentrations.

Why It's Used: Universal cosmetic ph adjuster and chelating agent. aha exfoliant activity is secondary.

How It Works: As ph adjuster, donates protons. as chelating agent, three carboxylic groups bind divalent metals (ca²⁺, mg²⁺, fe²⁺) preventing oxidative degradation.

Typically Found In: Nearly all cosmetic formulations,brightening products,exfoliants

TECHNICAL DETAILS

Primary Category: Active ingredient – alpha hydroxy acid (aha)

Secondary Functions: Chelating agent,ph adjustment,preservation enhancement

Application Areas:

Facial Skincare

Body Care

Hair Care

Beard Care

Color Cosmetics (Makeup)

Dietary/Oral Supplements

Typical Concentration Range: 0.1%–10%

SOURCING & ETHICS

Vegan Status: Yes – synthetic or fermentation-derived

Halal Status: Yes

Source Notes: Produced by fermentation of sugars by aspergillus niger. gras (e330). most abundant organic acid in citrus.

SKIN COMPATIBILITY

Irritancy Rating: 1/5 – very low at low concentrations; 2/5 at exfoliant concentrations

Comedogenicity Rating: 0/5 – non-comedogenic

Sensitivity Concerns: Photosensitizing – mandatory spf use. start at low frequency.

Safe for Sensitive Skin: Use with caution – spf required

SAFETY & COMPATIBILITY

Safety Profile: Safe at otc concentrations. eu: ≤10% leave-on at ph ≥3.5. mandatory spf advisory.

Works Well With: Niacinamide,ceramides,hyaluronic acid,spf

Avoid Combining With: Retinol in same step; multiple exfoliants simultaneously

SCIENTIFIC NOTE

Three carboxylic acid groups provide multiple proton donation sites and stronger chelation than monocarboxylic ahas. this makes citric acid the preferred cosmetic chelating agent alongside edta.

Last Verified: Cosing database,cir safety assessment,ewg skin deep

Primary Sources: 2026-03-12

DESCRIPTION

What It Does: Boosts foam, enhances mildness, and conditions skin and hair when combined with primary surfactants.

Why It's Used: The standard foam booster and mildness enhancer in virtually all shampoos, body washes, and facial cleansers – provides synergistic mildness improvement with anionic surfactants.

How It Works: Amphoteric (zwitterionic) character provides positive charge interaction with hair keratin for antistatic conditioning. reduces irritation of co-formulated anionic surfactants via ionic complex formation. foam stabilization via bilayer reinforcement in foam lamellae.

Typically Found In: Shampoos,body washes,facial cleansers,baby products

TECHNICAL DETAILS

Primary Category: Functional ingredient – amphoteric surfactant

Secondary Functions: Skin conditioning

Application Areas:

Facial Skincare

Body Care

Hair Care

Beard Care

Color Cosmetics (Makeup)

Dietary/Oral Supplements

Typical Concentration Range: 2%–15%

SOURCING & ETHICS

Vegan Status: Yes – from coconut fatty acids and dimethylaminopropylamine

Halal Status: Yes

Source Notes: Commercially produced for cosmetic use. verify vegan/halal status with supplier.

SKIN COMPATIBILITY

Irritancy Rating: 1/5 – very low

Comedogenicity Rating: 0/5 – non-comedogenic

Sensitivity Concerns: Well-tolerated by most skin types.

Safe for Sensitive Skin: Yes

SAFETY & COMPATIBILITY

Safety Profile: Good safety profile at recommended concentrations. ewg score: 1–2.

Works Well With: Standard skincare actives

Avoid Combining With: No known significant incompatibilities

SCIENTIFIC NOTE

Capb's mildness-enhancing synergy with sls has a molecular mechanism: capb's positive imidazoline head group forms an ion pair complex with sls's anionic sulfate group, reducing sls's free monomer concentration (the irritation-causing species) without significantly reducing micelle-forming capacity (the cleansing species).

Last Verified: Cosing database,ananthapadmanabhan surfactant review,cir safety assessment

Primary Sources: 2026-03-12

DESCRIPTION

What It Does: Provides broad-spectrum preservation against bacteria and fungi through controlled formaldehyde release, maintaining product safety throughout shelf life at eu-permitted concentrations.

Why It's Used: Formaldehyde-releasing preservatives provide reliable broad-spectrum preservation but face increasing consumer and regulatory scrutiny — eu requires label declaration, and many brands adopt 'formaldehyde-free' positioning due to sensitisation concerns.

How It Works: Hydrolysis in aqueous formulation releases formaldehyde (hcho) at controlled rates depending on ph and temperature. free formaldehyde cross-links bacterial proteins and nucleic acids through schiff base formation with amine groups, providing bactericidal activity. sensitisation risk from free formaldehyde's reactivity with skin proteins forming haptens.

Typically Found In: All aqueous formulations

TECHNICAL DETAILS

Primary Category: Active ingredient – cosmetic active

Secondary Functions: Skin conditioning

Application Areas:

Facial Skincare

Body Care

Hair Care

Beard Care

Color Cosmetics (Makeup)

Dietary/Oral Supplements

Typical Concentration Range: Check eu annex v limits

SOURCING & ETHICS

Vegan Status: Yes

Halal Status: Yes

Source Notes: Commercially produced for cosmetic use. verify vegan/halal status with supplier.

SKIN COMPATIBILITY

Irritancy Rating: 1/5 – very low

Comedogenicity Rating: 0/5 – non-comedogenic

Sensitivity Concerns: Well-tolerated by most skin types.

Safe for Sensitive Skin: Yes

SAFETY & COMPATIBILITY

Safety Profile: Good safety profile at recommended concentrations. ewg score: 1–2.

Works Well With: Standard skincare actives

Avoid Combining With: No known significant incompatibilities

SCIENTIFIC NOTE

Eu regulation 1223/2009 requires 'contains formaldehyde' label declaration when free formaldehyde >0.05% in the finished product. many formulators are transitioning away from formaldehyde-releasing preservatives to avoid this label requirement regardless of safety profile.

Last Verified: Cosing database,eu annex v formaldehyde-releasing preservative declaration

Primary Sources: 2026-03-12

DESCRIPTION

What It Does: Provides the complete fragrance profile contributing to product sensory experience and consumer appeal.

Why It's Used: Fragrance is a major consumer purchase driver — up to 70% of consumers make purchasing decisions partially based on product scent.

How It Works: Fragrance blends interact with olfactory receptors providing the sensory profile — complex mixtures activate multiple receptor types for rich, multidimensional scent experiences.

Typically Found In: All fragrance products

TECHNICAL DETAILS

Primary Category: Active ingredient – cosmetic active

Secondary Functions: Skin conditioning

Application Areas:

Facial Skincare

Body Care

Hair Care

Beard Care

Color Cosmetics (Makeup)

Dietary/Oral Supplements

Typical Concentration Range: Standard use levels

SOURCING & ETHICS

Vegan Status: Conditional

Halal Status: Yes

Source Notes: Commercially produced for cosmetic use. verify vegan/halal status with supplier.

SKIN COMPATIBILITY

Irritancy Rating: 1/5 – very low

Comedogenicity Rating: 0/5 – non-comedogenic

Sensitivity Concerns: Well-tolerated by most skin types.

Safe for Sensitive Skin: Yes

SAFETY & COMPATIBILITY

Safety Profile: Good safety profile at recommended concentrations. ewg score: 1–2.

Works Well With: Standard skincare actives

Avoid Combining With: No known significant incompatibilities

SCIENTIFIC NOTE

Ifra guidelines set usage limits for fragrance ingredients based on skin sensitisation and phototoxicity assessment for each application category.

Last Verified: Eu regulation 1223/2009 annex iii,ifra standards,fragrance allergen declaration requirements

Primary Sources: 2026-03-12

DESCRIPTION

What It Does: Stabilises o/w emulsions by reducing interfacial tension, solubilises oils and fragrances in aqueous systems, and wets oil-phase components for improved formulation homogeneity.

Why It's Used: Peg emulsifiers are selected for their precise hlb, broad ph stability (unlike soap emulsifiers that lose function at acidic ph), and compatibility with both anionic and cationic co-ingredients in the formulation system.

How It Works: Peg chain length determines hlb: longer peg = higher hlb = more hydrophilic = better o/w emulsification. at the o/w interface, the peg chain extends into the water phase forming a hydrated steric barrier that prevents droplet coalescence. nonionic character provides ph-independent function across the full cosmetic ph range.

Typically Found In: Emulsions,fragrance solubilisation

TECHNICAL DETAILS

Primary Category: Active ingredient – cosmetic active

Secondary Functions: Skin conditioning

Application Areas:

Facial Skincare

Body Care

Hair Care

Beard Care

Color Cosmetics (Makeup)

Dietary/Oral Supplements

Typical Concentration Range: 1%–10%

SOURCING & ETHICS

Vegan Status: Yes

Halal Status: Yes

Source Notes: Commercially produced for cosmetic use. verify vegan/halal status with supplier.

SKIN COMPATIBILITY

Irritancy Rating: 1/5 – very low

Comedogenicity Rating: 0/5 – non-comedogenic

Sensitivity Concerns: Well-tolerated by most skin types.

Safe for Sensitive Skin: Yes

SAFETY & COMPATIBILITY

Safety Profile: Good safety profile at recommended concentrations. ewg score: 1–2.

Works Well With: Standard skincare actives

Avoid Combining With: No known significant incompatibilities

SCIENTIFIC NOTE

Mixed peg emulsifier systems (e.g., peg-100 stearate + glyceryl stearate) form more cohesive interfacial films than single emulsifiers — the geometric complementarity of the co-emulsifier pair providing better mechanical emulsion stability than either component alone.

Last Verified: Cosing database,peg-80 sorbitan laurate peg emulsifier review

Primary Sources: 2026-03-12

DESCRIPTION

What It Does: Solubilizes fragrance oils and other lipophilic ingredients into water-based formulations.

Why It's Used: Standard fragrance solubilizer for water-based formulations – the industry standard for incorporating oil-soluble fragrances and actives into aqueous systems without separate oil phase.

How It Works: Hlb ~16.7 provides strong solubilization capacity for oils in water. laurate (c12) chain provides milder skin interaction than higher-hlb polysorbates. polyoxyethylene chains (20 eo units) provide high water solubility. effective solubilizer at 3-4:1 polysorbate:fragrance ratio.

Typically Found In: Toners,micellar waters,fragrance-containing aqueous products

TECHNICAL DETAILS

Primary Category: Functional ingredient – sorbitan ester emulsifier/solubilizer

Secondary Functions: Skin conditioning

Application Areas:

Facial Skincare

Body Care

Hair Care

Beard Care

Color Cosmetics (Makeup)

Dietary/Oral Supplements

Typical Concentration Range: 0.5%–5%

SOURCING & ETHICS

Vegan Status: Conditional – sorbitol from plant, peg from petroleum

Halal Status: Yes

Source Notes: Commercially produced for cosmetic use. verify vegan/halal status with supplier.

SKIN COMPATIBILITY

Irritancy Rating: 1/5 – very low

Comedogenicity Rating: 0/5 – non-comedogenic

Sensitivity Concerns: Well-tolerated by most skin types.

Safe for Sensitive Skin: Yes

SAFETY & COMPATIBILITY

Safety Profile: Same peg 1,4-dioxane concern as all peg compounds. quality-grade ps-20 should be tested for impurities.

Works Well With: Standard skincare actives

Avoid Combining With: No known significant incompatibilities

SCIENTIFIC NOTE

Polysorbate 20's optimal solubilization ratio (3-4 parts ps-20 per part fragrance oil) is lower than expected from pure hlb theory. this efficiency arises from polysorbate's formation of very small, stable oil-in-water microemulsions (droplets <50nm) rather than conventional emulsions, providing optically clear, thermodynamically stable fragrance incorporation that conventional emulsifiers cannot achieve.

Last Verified: Cosing database,cir safety assessment

Primary Sources: 2026-03-12

DESCRIPTION

What It Does: Delivers characteristic cosmetic function at recommended use concentration.

Why It's Used: Selected for functional contribution and formulation compatibility supported by cosmetic science and regulatory safety data.

How It Works: Works through the mechanism of its molecular class as documented in peer-reviewed cosmetic literature.

Typically Found In: Skin care formulations

TECHNICAL DETAILS

Primary Category: Active ingredient – cosmetic active

Secondary Functions: Skin conditioning

Application Areas:

Facial Skincare

Body Care

Hair Care

Beard Care

Color Cosmetics (Makeup)

Dietary/Oral Supplements

Typical Concentration Range: 0.1%–10%

SOURCING & ETHICS

Vegan Status: Conditional

Halal Status: Yes

Source Notes: Commercially produced for cosmetic use. verify vegan/halal status with supplier.

SKIN COMPATIBILITY

Irritancy Rating: 1/5 – very low

Comedogenicity Rating: 0/5 – non-comedogenic

Sensitivity Concerns: Well-tolerated by most skin types.

Safe for Sensitive Skin: Yes

SAFETY & COMPATIBILITY

Safety Profile: Good safety profile at recommended concentrations. ewg score: 1–2.

Works Well With: Standard skincare actives

Avoid Combining With: No known significant incompatibilities

SCIENTIFIC NOTE

Sodium chloride has an established safety profile within the cosmetic regulatory framework at standard use concentrations.

Last Verified: Cosing database,sodium chloride technical literature

Primary Sources: 2026-03-12

DESCRIPTION

What It Does: Delivers characteristic cosmetic function at recommended use concentration.

Why It's Used: Selected for functional contribution and formulation compatibility supported by cosmetic science and regulatory safety data.

How It Works: Works through the mechanism of its molecular class as documented in peer-reviewed cosmetic literature.

Typically Found In: Skin care formulations

TECHNICAL DETAILS

Primary Category: Active ingredient – cosmetic active

Secondary Functions: Skin conditioning

Application Areas:

Facial Skincare

Body Care

Hair Care

Beard Care

Color Cosmetics (Makeup)

Dietary/Oral Supplements

Typical Concentration Range: 0.1%–10%

SOURCING & ETHICS

Vegan Status: Conditional

Halal Status: Yes

Source Notes: Commercially produced for cosmetic use. verify vegan/halal status with supplier.

SKIN COMPATIBILITY

Irritancy Rating: 1/5 – very low

Comedogenicity Rating: 0/5 – non-comedogenic

Sensitivity Concerns: Well-tolerated by most skin types.

Safe for Sensitive Skin: Yes

SAFETY & COMPATIBILITY

Safety Profile: Good safety profile at recommended concentrations. ewg score: 1–2.

Works Well With: Standard skincare actives

Avoid Combining With: No known significant incompatibilities

SCIENTIFIC NOTE

Sodium hydroxide has an established safety profile within the cosmetic regulatory framework at standard use concentrations.

Last Verified: Cosing database,sodium hydroxide technical literature

Primary Sources: 2026-03-12

DESCRIPTION

What It Does: Provides excellent foam and cleansing with significantly lower irritation than sls.

Why It's Used: The dominant primary surfactant in mainstream personal care – improved mildness over sls while retaining excellent foam and cleansing performance.

How It Works: Ethoxylation (2-3 eo units) inserts polyethylene oxide spacer between dodecyl chain and sulfate, sterically shielding sulfate from direct protein contact, reducing irritation vs sls. full micellar cleansing capacity retained.

Typically Found In: Shampoos,body washes,facial cleansers,household cleansers

TECHNICAL DETAILS

Primary Category: Functional ingredient – ethoxylated anionic surfactant

Secondary Functions: Skin conditioning

Application Areas:

Facial Skincare

Body Care

Hair Care

Beard Care

Color Cosmetics (Makeup)

Dietary/Oral Supplements

Typical Concentration Range: 2%–15%

SOURCING & ETHICS

Vegan Status: Yes – from coconut fatty acids

Halal Status: Yes

Source Notes: Ethoxylation process can generate trace 1,4-dioxane impurity – reputable manufacturers purify to <1ppm. look for sles certified with dioxane specification.

SKIN COMPATIBILITY

Irritancy Rating: 2/5 – low to moderate (significantly milder than sls)

Comedogenicity Rating: 0/5 – non-comedogenic

Sensitivity Concerns: Well-tolerated by most skin types.

Safe for Sensitive Skin: Yes

SAFETY & COMPATIBILITY

Safety Profile: Well-established safety. ewg score: 3 (1,4-dioxane impurity concern – use sles from ethoxylation with purification confirmation).

Works Well With: Standard skincare actives

Avoid Combining With: No known significant incompatibilities

SCIENTIFIC NOTE

Sles's reduced irritation vs sls directly correlates with the degree of ethoxylation – sles-2 (2 eo units) is milder than sls but not as mild as sles-3 (3 eo units). each ethylene oxide unit adds steric shielding around the sulfate group, progressively reducing its protein-binding and denaturation capacity.

Last Verified: Cosing database,ananthapadmanabhan et al. surfactant review,cir safety assessment

Primary Sources: 2026-03-12

DESCRIPTION

What It Does: Provides edta chelation in alkaline formulations where disodium edta has limited solubility.

Why It's Used: Alkaline-ph edta chelation for cleansers and alkaline formulations requiring metal sequestration beyond the solubility limit of disodium edta.

How It Works: Tetrasodium salt provides greater water solubility at alkaline ph vs disodium form (pka effects). same hexadentate chelation mechanism as disodium edta. preferred in alkaline cleansers (ph 7-10). identical chelation efficacy per mole vs disodium edta.

Typically Found In: Alkaline cleansers,high ph formulations,soap-based products

TECHNICAL DETAILS

Primary Category: Functional ingredient – chelating agent alkaline

Secondary Functions: Skin conditioning

Application Areas:

Facial Skincare

Body Care

Hair Care

Beard Care

Color Cosmetics (Makeup)

Dietary/Oral Supplements

Typical Concentration Range: 0.005%–0.1%

SOURCING & ETHICS

Vegan Status: Yes – synthetic

Halal Status: Yes

Source Notes: Commercially produced for cosmetic use. verify vegan/halal status with supplier.

SKIN COMPATIBILITY

Irritancy Rating: 1/5 – very low

Comedogenicity Rating: 0/5 – non-comedogenic

Sensitivity Concerns: Well-tolerated by most skin types.

Safe for Sensitive Skin: Yes

SAFETY & COMPATIBILITY

Safety Profile: Good safety profile at recommended concentrations. ewg score: 1–2.

Works Well With: Standard skincare actives

Avoid Combining With: No known significant incompatibilities

SCIENTIFIC NOTE

Tetrasodium edta's alkaline ph advantage reflects the ionisation state of edta carboxylate groups: at ph 7 disodium edta has two ionised carboxylates (fully soluble) and two protonated (affects solubility limit). tetrasodium edta's four sodium counterions provide four ionised carboxylates at all ph values — fully charged, fully soluble across the entire ph range.

Last Verified: Cosing database,cir safety assessment

Primary Sources: 2026-03-12