Nigella Seeds

Sold as kalonji or black cumin, though it is neither cumin nor onion seed despite both names being used for it in different markets. We specify the botanical name to avoid the substitution that follows from that confusion.

What to fix on the specification

• Botanical name: Nigella sativa, stated explicitly.
• Purity: 99%, with the counting method.
• Moisture and foreign matter.
• Volatile oil, for supplement use.
• Total ash and acid-insoluble ash.

Sold as kalonji and as black cumin, though it is neither cumin nor onion seed. Naming the species on the contract is what prevents the substitution those names invite. Writing a specification covers identity.