👉 Sulphonphthalein is a naturally occurring compound that plays a key role in various biological processes, including the regulation of the immune system and the production of hormones. It is also found in certain plants, including thyme, where it has been used historically to enhance its medicinal properties. The term "sulphonphthalein" is commonly associated with the chemical compound sulfinpyridine, which is derived from the plant material (usually thymol) that contains this