The W5 Thick Bleach Safety Data Sheet (SDS) identifies the product as a hazardous chemical primarily composed of sodium hypochlorite and sodium hydroxide. Under EU REACH regulations, it is classified as corrosive and environmentally hazardous. Core Safety Profile
The exact percentage is proprietary (trade secret), but the SDS will list a concentration range. For W5 Thick Bleach, you can expect:
This is arguably the most important part of the safety data sheet for W5 Thick Bleach for the average user. The SDS mandates specific, immediate actions: safety data sheet for w5 thick bleach
Section 10: Stability and reactivity
Accidental Release Measures
While the exact formulation of W5 products can vary slightly by region and production batch, the core ingredient remains consistent. According to publicly available data sheets for similar supermarket-brand thick bleaches (which often mirror W5's composition), the primary hazardous ingredient is Sodium Hypochlorite.
Clear, pale yellow viscous liquid with a characteristic chlorine (hypochlorite) odor. Highly alkaline, typically between 13.0 and 14.0 BB Foodservice 2. Hazard Identification Health Hazards: The W5 Thick Bleach Safety Data Sheet (SDS)
Fire: The product itself is not flammable but can release toxic chlorine gas when heated.