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Product Name: Sodium Laureth Sulfate
Chemical Family: Alkyl Ether Sulfates
Common Uses: Shampoo, liquid soap, cleaning agents, personal care products
CAS Number: 9004-82-4
Formula: CH3(CH2)11(OCH2CH2)nOSO3Na
SLES shows up in most cleaning aisles, carrying grease and dirt away without much fuss. Kids, pets, and professionals handle it daily, often without realizing it's in their everyday soap.
Physical State: Liquid or paste, usually clear or slightly yellow
Major Hazards: Eye irritation, skin irritation, potential for respiratory discomfort if aerosolized
Chronic Exposure Risks: Long-term use in poorly ventilated spaces can cause dry skin or dermatitis
Fire Risk: Combustible at high temperatures but unlikely to ignite under normal use
SLES often gets attention for causing soapy eyes and irritation in sensitive skin, especially with frequent contact. Most effects land in the nuisance category, but people with dermatitis or broken skin see flare-ups without proper protection.
Main Ingredient: Sodium Laureth Sulfate (range: 25–70%)
Possible Impurities: 1,4-Dioxane (trace amounts from ethoxylation), unreacted alcohols, salts
Products rarely stay pure—byproducts and tiny contaminants, such as 1,4-dioxane, sometimes linger in trace amounts, making it smart to read up if allergies or sensitivities run in the family.
Inhalation: Bring person to fresh air if breathing dust or mist has caused discomfort
Skin Contact: Wash off with plenty of water and mild soap
Eye Contact: Rinse carefully with water for several minutes; remove contact lenses if easy
Ingestion: Small accidental amounts rarely cause harm, but drinking water helps relieve sore mouth or throat
Daily use can cause dry hands for hairdressers and janitors, and splashes in the eye sting like crazy. Quick rinsing usually sorts out minor misery, but inflamed eyes sometimes need a doctor’s opinion.
Suitable Extinguishing Media: Water spray, dry powder, foam, carbon dioxide
Special Hazards: Burning can produce irritating fumes, such as sulfur oxides
Protective Equipment: Full protective gear and self-contained breathing apparatus for large fires
Residential settings rarely see SLES burning, but facility fires demand more than just a garden hose—smoke from burning SLES should stay out of lungs, so firefighters turn to proper gear and good ventilation.
Personal Precautions: Gloves, goggles; avoid walking on spilled material to cut slip risk
Environmental Precautions: Block flow into drains or streams when spills are large
Clean-Up Methods: Soak up with absorbent material and dispose based on local regulations; rinse residue with water
Spills happen in factories and home bathrooms alike. Mop up with towels and keep wash water out of storm drains, especially when big jugs tip over in supply closets. Slippery floors bring as much trouble as possible environmental impact.
Safe Handling Tips: Wear gloves if exposure is constant, avoid rubbing eyes, never mix with strong acids
Storage Conditions: Cool, dry place away from heat and incompatible materials; keep containers tightly closed
Home users rarely see issues, but busy salons and cleaning supply rooms can handle gallons at a time. Proper seals keep messes away and freshness intact, making cleaning days less of a chore.
Engineering Controls: Good ventilation helps in manufacturing and bulk storage spaces
Personal Protective Equipment: Gloves and goggles for heavy or frequent contact; normal use in diluted shampoo or soaps usually safe for most people
Routine use of SLES-based soaps by families and workers lowers risk, but production-line workers often rely on gloves and eyewear, learning early that raw SLES takes no prisoners on sensitive skin.
Appearance: Clear to yellowish viscous liquid or paste
Odor: Mild, like most detergents
pH (1% solution): Usually between 6.5 and 9
Solubility: Easily dissolves in water
Boiling Point: Over 100°C, as a solution
Flash Point: Not considered flammable
Liquid SLES looks harmless in a squirt bottle or shampoo jug, but the concentration and pH make raw product less gentle than the watered-down versions.
Chemical Stability: Stable under normal storage and handling conditions
Incompatible Materials: Strong acids, oxidizing agents
Decomposition Products: Sulfur oxides after burning or exposure to high heat
No one expects reactive problems with daily SLES use, but in bulk or storage tanks, chemicals like bleach or acids kept nearby need careful separation. Safety ramps up in industrial facilities, where processes heat or mix chemicals on a large scale.
Acute Effects: Can cause moderate skin and eye irritation, sometimes respiratory discomfort with mist or spray
Chronic Effects: With repeated exposure, dryness or dermatitis surfaces in sensitive skin
Ingestion Risks: Nausea or irritation if swallowed in large quantities
Studies show regular use doesn’t raise cancer risks or serious health concerns for average consumers, but people with allergies and eczema steer clear or patch-test before use.
Aquatic Toxicity: Harmful to aquatic life at high concentrations
Persistence: Does not persist forever, but breakdown depends on water treatment quality
Bioaccumulation: Low risk, but foam on streams signals runoff issues
Wastewater loaded with wash-off from homes and factories can foam up in rivers if treatment lags, signaling too much SLES present. Proper treatment cuts risks, but overuse in car washes and laundries has prompted calls for biodegradable alternatives.
Disposal Methods: Small amounts usually safe with regular sewage, but large volumes must match local or regional rules
Recommendations: Don’t pour concentrated SLES into storm drains or on the ground; get advice for commercial amounts
Most folks finish a shampoo bottle and toss it in the bin, missing the challenge factories face with leftover batches or expired drums. Environmental agencies stress careful disposal and favor systems that turn residues into harmless waste.
UN Classification: Sometimes classified as non-hazardous for transport, but check packaging and local standards
Packing Considerations: Leak-proof containers keep spillage rare
Deliveries of SLES run by the truckload to big bottlers and janitorial suppliers. Most couriers see SLES as safe for transit in the right containers but steering clear of mixing with incompatible chemicals ensures smooth delivery every time.
Global Regulations: Approved for consumer use in many countries, subject to limits on impurities like 1,4-dioxane
Labeling Requirements: Calls for warnings about eye and skin irritation in concentrated forms
Restrictions: Some countries restrict use in children’s bath products or set allowable impurity levels
Regulators keep a close watch on consumer ingredient lists, making sure impurities stay at safe levels. Labels in North America, Europe, and Asia spell out risks, and activists continue to campaign for transparency on all added chemicals.
