While it might not sound appealing to destroy or deteriorate a prized finished good, this type of test is essential for safety. Even products made of plastic might become toxic if they type of plastic produced toxins after being degraded by heat or solar energy. This would definitely be unsafe for toys and food products, as any toxic compounds would enter the mouth. Forced degradation exercises just means that your company’s product is safe throughout its lifespan.
For a factory that uses chemistry to deliver the product, testing constituent materials is essential to safety. The feed stock cannot produce dangerous by products either during production or during the lifetime of consumer goods. The chemicals themselves might break down into hazards during storage, or intermediate chemical produces might produce too much toxins. It happens with alarming frequency in industry, and testing materials is standard practice anyway.