Elements which might be primary skin irritants or sensitizers Materials whose LD50 for acute oral toxicity is larger than fifty mg/kg but under or equal to 500 mg/kg.Rating three: Elements that in themselves are effective at detonation or explosive decomposition or explosive reaction but that require a strong initiating source or need to be heated

Terracotta pipe networks have been in use throughout the UK for centuries, valued for their longevity, earth-derived materials, and robust long-term capability. Formed through high-temperature kiln processing, these systems exhibit outstanding chemical resistance, suiting both foul and surface water management. Despite the emergence of modern alter