Complex sentence: Curing salts are generally a mixture of table salt and sodium nitrite, which serves to inhibit the growth of bacteria, specifically "Clostridium botulinum" in an effort to prevent botulism, and helps preserve the color of cured meat.
Split into simpler sentences: Curing salts are generally a mixture of table salt and sodium nitrite. They usually contain sodium nitrite which serves to inhibit the growth of bacteria, specifically "Clostridium botulinum" in an effort to prevent botulism, and helps preserve the color of cured meat.