Food Object 1010 Kala namak (Urdu / Hindi) or bire noon (Nepalese; literally "black salt") is a type of rock salt, a salty and pungent-smelling condiment used in South Asia. It is also known as "Himalayan black salt", Sulemani namak, bit lobon, kala noon, or pada loon. It is found mostly in the Himalayas.
Kala namak is used extensively in South Asian cuisines of Bangladesh, Nepal, India and Pakistan as a condiment or added to chaats, chutneys, salads, all kinds of fruits, raitas and many other savory Indian snacks. Chaat masala, an Indian spice blend, is dependent upon black salt for its characteristic sulfurous hard-boiled-egg aroma. Those who are not accustomed to black salt often describe the smell as similar to rotten eggs. Kala namak is appreciated by some vegans in dishes that mimic the taste of eggs. It is used, for example, to season tofu or avocado to mimic an egg salad