What kala namak is

Kala namak is sodium chloride that has been heated with a source of sulphur and a reducing agent. Some of the sulphate present is converted into sulphide compounds, including hydrogen sulphide, that stay trapped in the salt. Those compounds give the aroma; traces of iron sulphide and iron oxides give the colour. Ground kala namak is pink-violet to brick red; only the unground lumps look dark. It is not iodised.

Composition: published compilations of typical kala namak analyses; individual products vary.

How it is made: traditional and modern

The flavour is chemistry, not geography

This is the most important section of this page.

Many black salt packs say “Himalayan”. The traditional raw material was indeed rock salt from the Himalayan region, and most commercial Himalayan rock salt is mined in the Salt Range of Pakistan. But two facts make that claim worth checking on any black salt shipped from India today:

• India mines almost no rock salt. According to the Indian Bureau of Mines, India’s entire rock salt production in 2021-22 was 286 tonnes, from a single mine at Drang in Mandi, Himachal Pradesh. In October 2026 that mine was reported to have been closed for about a year and a half, with plans for about 7,700 tonnes over five years once it reopens.
• India has banned all imports of Pakistani-origin goods, direct or indirect, since 2 May 2025, under DGFT Notification 06/2025-26.

Uses

Two points for labels and marketing. Kala namak’s sodium content is only slightly lower than that of table salt, a difference that is nutritionally trivial, so “low sodium” is not an honest claim. And because it is not iodised, it should not be presented as a replacement for iodised salt.

Not to be confused with

“Black salt” is also used for black lava salt — sea salt blended with activated charcoal — and for some non-food products. Kala namak is a different product with a different flavour. Use the name “kala namak” or “Indian black salt” on contracts and labels to avoid confusion.

Specification: what should be in the contract

Packaging that keeps the aroma in — and away from everything else

Kala namak’s aroma is its value, and it is volatile. Poor packaging loses it on the shelf. It can also spread into other cargo: a pallet of black salt stowed beside tea, spices or cereals can taint them. Specify high-barrier, well-sealed packs, ask for separate stowage in the container or a dedicated container for large lots, and check the aroma of the arrival sample against the pre-shipment reference.

Where the buyers are

Black salt is not separated from other salt or seasonings in trade statistics, so we do not quote a market share. The buyers fall into two groups: importers and brands serving South Asian communities, in the UK, North America, the Gulf and Europe; and the fast-growing vegan and plant-based food sector, strongest in Germany, the Netherlands, the UK, France and Spain. That is why this guide is published in English, German, French, Spanish and Dutch.

Packing: private labelling from 1 kg to 50 kg, and bulk shipments

RNG Agro Exports offers private labelling from 1 kg to 50 kg pack sizes, and we also handle bulk shipments.

Working with RNG Agro Exports

We are based in Rajkot, Gujarat, the state that makes about 85% of India’s salt, and we supply kala namak from qualified producers in India. We tell you the base salt and the process for every lot, so the claims on your label are ones you can defend. We agree aroma and colour against a reference sample, and we pack to keep the aroma in. If a “Himalayan” claim cannot be documented, we will advise you not to print it.

Frequently asked questions

What gives kala namak its egg-like smell?

Sulphur compounds. Kala namak is sodium chloride heated with a sulphur source and a reducing agent; part of the sulphate is converted into sulphide compounds, including hydrogen sulphide, that stay trapped in the salt and give the aroma reminiscent of cooked egg yolk. Traces of iron sulphide and iron oxides give the colour, which is pink-violet to brick red when ground. Typical analyses put kala namak at about 95–97% sodium chloride, about 1% sodium sulphate, under 1% sodium bisulphate, and trace iron sulphide and hydrogen sulphide. The aroma is volatile and fades with prolonged heat, which is why cooks usually add it at the end, and why packaging needs to be airtight.

Is Indian black salt made from Himalayan rock salt?

In general, not today. Traditional kala namak was made from Himalayan-region rock salt, and most commercial Himalayan rock salt is mined in Pakistan’s Salt Range. India has banned all direct and indirect imports of Pakistani-origin goods since 2 May 2025 under DGFT Notification 06/2025-26, and India’s own rock salt production was just 286 tonnes in 2021-22, from a single mine at Drang in Himachal Pradesh, which was reported in October 2026 to have been closed for about a year and a half. The flavour comes from the chemistry of heating salt with sulphur and a reducing agent, not from where the salt was mined. Ask your supplier which base salt and process were used, and print only claims that can be documented.

How is kala namak made?

Two ways. In the traditional method, raw rock salt is sealed in ceramic jars with charcoal and plant materials such as harad (Terminalia chebula), bahera (Terminalia bellirica) and amla, together with natron, and fired at about 700–900°C for up to 24 hours before being cooled, removed and aged; the heat converts part of the sulphate into sulphur compounds that stay trapped in the crystal. In the modern method, sodium chloride is combined with sodium sulphate, sodium bisulphate and ferric sulphate, with a reducing agent, and heated to reproduce the same chemistry under control. Both can give the characteristic flavour; a buyer should know which method was used and specify aroma and colour against a reference sample.

Is black salt healthier than table salt?

Not in any way that justifies a health claim. Kala namak’s sodium content is only slightly lower than that of table salt, a difference that is nutritionally trivial, so “low sodium” is not an honest claim. It contains slightly more iron than table salt, but not enough to be a meaningful source. It is not iodised, so it should not be presented as a replacement for iodised salt in households that rely on salt for iodine. Its value is flavour: the sulphurous, egg-like aroma that makes it essential in Indian street food and in vegan dishes such as tofu scramble and vegan mayonnaise. We recommend marketing it on taste rather than on health.

Do you offer private labelling and bulk shipments for black salt?

Yes. RNG Agro Exports offers private labelling from 1 kg to 50 kg pack sizes and also handles bulk shipments. Typical formats are 1 kg retail and food-service packs, also used by brands that repack into smaller jars; 2 kg to 5 kg packs for restaurants and caterers; 10 kg to 25 kg bags for spice blenders and snack-seasoning manufacturers; 50 kg bags for large blenders and repackers; and lumps or granules in lined bulk packaging for grinders, quoted on enquiry. Because kala namak’s aroma is volatile and can taint other goods, we use high-barrier packaging and recommend separate stowage. Tell us the form, the aroma and colour you want, your label claims, your destination and your annual quantity.

• Sulphur compounds. Kala namak is sodium chloride heated with a sulphur source and a reducing agent; part of the sulphate is converted into sulphide compounds, including hydrogen sulphide, that stay trapped in the salt and give the aroma reminiscent of cooked egg yolk. Traces of iron sulphide and iron oxides give the colour, which is pink-violet to brick red when ground. Typical analyses put kala namak at about 95–97% sodium chloride, about 1% sodium sulphate, under 1% sodium bisulphate, and trace iron sulphide and hydrogen sulphide. The aroma is volatile and fades with prolonged heat, which is why cooks usually add it at the end, and why packaging needs to be airtight.
• In general, not today. Traditional kala namak was made from Himalayan-region rock salt, and most commercial Himalayan rock salt is mined in Pakistan’s Salt Range. India has banned all direct and indirect imports of Pakistani-origin goods since 2 May 2025 under DGFT Notification 06/2025-26, and India’s own rock salt production was just 286 tonnes in 2021-22, from a single mine at Drang in Himachal Pradesh, which was reported in October 2026 to have been closed for about a year and a half. The flavour comes from the chemistry of heating salt with sulphur and a reducing agent, not from where the salt was mined. Ask your supplier which base salt and process were used, and print only claims that can be documented.
• Two ways. In the traditional method, raw rock salt is sealed in ceramic jars with charcoal and plant materials such as harad (Terminalia chebula), bahera (Terminalia bellirica) and amla, together with natron, and fired at about 700–900°C for up to 24 hours before being cooled, removed and aged; the heat converts part of the sulphate into sulphur compounds that stay trapped in the crystal. In the modern method, sodium chloride is combined with sodium sulphate, sodium bisulphate and ferric sulphate, with a reducing agent, and heated to reproduce the same chemistry under control. Both can give the characteristic flavour; a buyer should know which method was used and specify aroma and colour against a reference sample.
• Not in any way that justifies a health claim. Kala namak’s sodium content is only slightly lower than that of table salt, a difference that is nutritionally trivial, so “low sodium” is not an honest claim. It contains slightly more iron than table salt, but not enough to be a meaningful source. It is not iodised, so it should not be presented as a replacement for iodised salt in households that rely on salt for iodine. Its value is flavour: the sulphurous, egg-like aroma that makes it essential in Indian street food and in vegan dishes such as tofu scramble and vegan mayonnaise. We recommend marketing it on taste rather than on health.

What this means. The egg-like flavour of kala namak comes from the sulphur compounds produced by heating salt with a sulphur source and a reducing agent. It does not come from the mountain the salt was mined in. Black salt made in India today is, in general, made from salt that is not Himalayan rock salt. That is not a defect: the chemistry, and therefore the flavour, can be the same. What would be a defect is a label claiming “Himalayan” origin that the supplier cannot document. Ask what base salt was used and which process, and print only what is true. We state both for every lot we supply.