Safety Data Sheet For W5 Thick Bleach May 2026

| Chemical Name | CAS Number | Concentration (% w/w) | | :--- | :--- | :--- | | Sodium Hypochlorite | 7681-52-9 | 5 – 15% | | Sodium Hydroxide | 1310-73-2 | < 1% (stabilizer) | | Surfactants (thickener) | Proprietary | 1 – 5% | | Water | 7732-18-5 | Balance to 100% |

Note: Exact percentages are trade secrets. Active chlorine content typically 5–10%.

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Product Name: W5 Thick Bleach Revision Date: [Current Date] Version: 1.1 safety data sheet for w5 thick bleach

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The SDS is a formal document, usually 6–10 pages long, that tells you everything the manufacturer (W5/Lidl) is legally required to disclose about the product’s hazards. It’s not just legal jargon—it’s a lifesaving tool.

The SDS cites acute toxicity data: oral LD50 for sodium hypochlorite in rats is ~8 g/kg, but the concentrated solution is corrosive. Repeated skin contact can cause dermatitis. Ecologically, sodium hypochlorite is highly toxic to fish, algae, and aquatic invertebrates (EC50 <0.1 mg/L). However, it degrades rapidly in water to chloride and oxygen, reducing long-term persistence. Still, the SDS emphasizes preventing environmental release. | Chemical Name | CAS Number | Concentration

The SDS provides explicit rules that many users overlook:

In a bright cleaning closet lived W5 Thick Bleach in a heavy-duty plastic bottle. Though proud of its whitening powers, it knew it must be handled with respect. If splashed into eyes, it caused severe burning and watering. If breathed in as strong fumes, it made the throat tighten and caused coughing. Swallowing the thick liquid could upset the stomach and lead to serious harm. When mixed with acids or ammonia, it became furious — giving off choking chlorine gas that made breathing nearly impossible. The bottle carried clear danger signs: corrosive to skin and eyes, respiratory irritant, and reactive with certain chemicals. Product Name: W5 Thick Bleach Revision Date: [Current

Based on the official SDS for this product (typically listing the identifier "Sodium Hypochlorite <5%"), here’s what you need to know:

1. It’s Corrosive (Hazard Statement H314)

2. Dangerous Gas – Never Mix with Other Cleaners (Hazard Statement H400)

3. Harmful to Aquatic Life