Cocoa Powder pH and Colour: How to Specify Them

When buyers talk about cocoa powder, they usually start with colour: a red cocoa, a dark cocoa, a black cocoa. When a supplier specifies it, the starting point is pH. The two are closely linked, and understanding that link is the quickest way to order the right powder and receive the same powder every time.

Why pH comes first

Cocoa beans are naturally acidic. Alkalization neutralises part of that acidity, and the further it goes, the higher the pH climbs. As pH rises, three things move together:

• Colour darkens, from light brown through reddish brown and dark brown to black.
• Flavour becomes rounder and less sharp.
• Behaviour changes: the powder disperses more easily in liquid and no longer reacts with baking soda.

Because one number moves all three, pH is the value cocoa powder is ordered by.

One range, six grades

İmesta Food’s powders cover the whole scale, from natural to the darkest alkalized grade:

Grade	pH	Colour	Typical use
İ6	5.7 ± 0.3	Light brown	Baking with soda, lighter colour
İ8	7.0 ± 0.3	Reddish brown	Warm tones, keeps visible red
MS10	7.0 – 7.5	Blackish brown	Dark colour at moderate pH
İ10	7.5 ± 0.3	Dark brown	General purpose dark cocoa
İ9	7.8 ± 0.3	Dark brown	Deeper brown, drinks and fillings
İ12	8.5 ± 0.3	Black	Black biscuits and shells

Reading the tolerance

A value such as 7.5 ± 0.3 is a promise about every lot: the pH will be between 7.2 and 7.8. The technical data sheet gives this range; the certificate of analysis for your delivery gives the measured value inside it.

Two practical points follow:

1. Neighbouring grades can overlap. İ10 (7.5 ± 0.3) and İ9 (7.8 ± 0.3) share part of their range. If your product is colour-sensitive, choose by a reference sample, not by the nominal pH alone.
2. Tighter is not always possible. Cocoa is a natural raw material. A tolerance of ±0.3 is a realistic working standard; asking for much less usually means paying for extra sorting and blending.

pH is not the only thing that sets colour

Colour also depends on how the alkalization is carried out: temperature, time and the alkali used. That is why MS10 reaches a blackish brown at pH 7.0–7.5, while İ10 at a higher pH stays dark brown.

Alkalization also dulls red. İ8, the lightest alkalized grade, still shows clear red; İ12 has almost none. If you want a warm, reddish tone, stay at the low end of the alkalized scale.

Ash rises with alkalization

The alkali leaves minerals behind, so ash content increases as cocoa is alkalized. A limit such as 9 % max matters most in the darkest grades. If you move from a mid-range grade to a black one, check that the ash value still fits your own specification.

How to avoid colour complaints

Colour is where most cocoa complaints come from, not flavour. Three habits prevent most of them:

• Agree on a physical reference sample at the start and keep part of it.
• Compare under the same conditions: same light, same dilution or the same finished product, not powder against powder in different bags.
• Check the certificate of analysis against the data sheet for every lot.

Compare every grade on the alkalized cocoa powder page, read what each value on the data sheet means on the documents page, or request a sample to set your own reference.