What is the acceptable moisture content for shea butter?

Lower moisture is better without exception. The ECOWAS/UEMOA regional Grade 1 reference is ≤ 0.05 %, Grade 2 0.05–0.2 % and Grade 3 0.2–2 %. Refined N-RBD is typically drier still after vacuum deodorisation. EMI Agro states the measured value and method on every Certificate of Analysis.

Why does moisture content matter in an anhydrous fat like shea butter?

Water is the reagent for hydrolysis: with lipase or heat it splits triglycerides into free fatty acids, so FFA rises in storage. Water pockets also let mould grow. At 1 % moisture a buyer pays butter price for 10 kg of water per tonne.

How is moisture content in shea butter measured — oven or Karl Fischer?

Oven and hot-plate methods (AOCS Ca 2c-25 / Ca 2b-38, ISO 662) measure mass loss on heating — moisture and volatile matter. Karl Fischer (ISO 8534) measures water only and is preferred below about 0.1 %. Ask which method a COA used; the two results are close but not identical.

Does high moisture content make shea butter go mouldy?

It can. Free water at the surface or drum bottom supports mould and yeast, especially in warm storage; visible spots and a musty smell are the signs. Dry butter within a tight Grade A-type band does not support growth. Keep drums sealed and avoid condensation.

What does "moisture and volatile matter" mean on a shea butter COA?

Moisture and volatile matter is the total mass lost when the sample is heated under the method’s conditions — water plus any volatile compounds — so it reads slightly higher than water content alone. It is the standard oven-method result. “Water content” on a COA indicates Karl Fischer.

Can moisture content in shea butter increase after delivery?

Yes, if drums are opened in humid conditions, left unsealed, or cycled between warm and cold so that condensation forms inside the drum. Keep drums closed, store at a stable cool temperature, and re-test moisture with free fatty acid if stock is held for a long time.

Specifications

Moisture Content in Shea Butter

Why an anhydrous fat carries a moisture limit, how the two test methods differ, and what moisture does to FFA and mould in storage.

Moisture content (moisture and volatile matter) is the percentage of a fat's mass lost as water and volatiles under defined heating, or water alone when measured by Karl Fischer titration. Shea butter should be essentially dry: regional Grade 1 unrefined shea is typically specified at ≤ 0.05 %, and refined N-RBD lower still. Residual water lets lipase raise free fatty acid and lets mould grow during storage.

Moisture at a glance

Unit: % (mass)
Test methods: AOCS Ca 2c-25 (air oven) · Ca 2b-38 (hot plate) · ISO 662 · ISO 8534 (Karl Fischer)
What high moisture means: Hydrolysis (FFA rise) and mould risk; paying for water
Control lever: Process (kernel drying, settling, dry filling)
Companion parameter: FFA (moisture is its main storage-phase driver)

What moisture content measures in a fat

A pure triglyceride fat contains no water. Any water in shea butter is carried over from the process (kernel moisture, water used in traditional kneading, condensation) or absorbed later.

Two different quantities share the COA line: moisture and volatile matter (mass loss on heating — water plus volatiles) and water content (Karl Fischer — water only). Oven results are typically slightly higher. Buyers should ask which method was used; a spec that mixes methods is not comparable.

Moisture content tells you how much water the process left behind in the butter — and water is the reagent that lets free fatty acid and mould develop in the drum.

Typical moisture values by grade

Moisture and volatile matter (%) by shea butter grade — EMI Agro does not publish a standing contractual range; the batch COA states the measured value and method
Grade	Value%	What it usually indicates	EMI supply status
Grade A	—	Moisture above a tight band accelerates hydrolysis and microbial risk in an otherwise anhydrous fat.	Confirm on the batch COA
Grade B	—	Moisture above a tight band accelerates hydrolysis and microbial risk in an otherwise anhydrous fat.	Confirm on the batch COA
Grade C	—	Moisture above a tight band accelerates hydrolysis and microbial risk in an otherwise anhydrous fat.	Confirm on the batch COA
Refined N-RBD	—	Moisture above a tight band accelerates hydrolysis and microbial risk in an otherwise anhydrous fat.	Confirm on the batch COA

See the regional Grade 1/2/3 table below for published context. The Certificate of Analysis governs the lot.

Regional Grade 1 (≤ 0.05 %) sits near the limit of oven methods — Karl Fischer is preferred at that level. Refined butter is drier because vacuum deodorisation drives water off. A moisture result above the grade band usually indicates incomplete drying, settling or wet filling.

Published reference points — ECOWAS/UEMOA regional standard for unrefined shea butter (not EMI limits)
Regional grade	Moisture%
Grade 1	≤ 0.05
Grade 2	0.05–0.2
Grade 3	0.2–2

How moisture content is measured (AOCS Ca 2c-25 / ISO 662 / Karl Fischer)

Air oven (AOCS Ca 2c-25; ISO 662 method B): weigh about 5 g of melted, mixed sample into a tared dish; dry at 101–105 °C to constant mass; loss = moisture and volatile matter %.

Hot plate (AOCS Ca 2b-38; ISO 662 method A): heat with swirling until bubbling stops — faster, less precise, and unsuitable for very low levels.

Karl Fischer (ISO 8534): titration specific to water; the method of choice below about 0.1 %. The sample must be fully melted and homogenised — water settles to the drum bottom. See AOCS Ca 2c-25 and the COA interpreter.

Why moisture matters to buyers

Water plus triglyceride (with lipase or heat) yields free fatty acids — so free fatty acid rises during storage even if it was low at dispatch. Water pockets allow mould and yeast. Hydrolysis products then oxidise faster — see peroxide value.

Processing problems include spattering when melted, cloudy melted butter, and inaccurate hot-fill dosing. Commercially, at 1 % moisture a 20 t container carries 200 kg of water paid for at butter price.

Low moisture is what keeps a low FFA low: a dry Grade A butter stays Grade A in the drum; a wet one drifts toward Grade B.

Moisture is a process parameter

Unlike FFA (set by kernel history before pressing), moisture is decided by drying and by how the butter is heated, settled and filled after extraction — it is the one freshness parameter a processor fully controls.

Traditional wet extraction leaves more residual water than mechanical pressing followed by heating and settling. Roasting or warm-conditioning of kernels lowers moisture but shifts classification — see shea butter grades. Refining (vacuum deodorisation) drives moisture to near zero; see how shea butter is refined to N-RBD.

How EMI Agro controls moisture

EMI Agro states the measured moisture (and the method) on the Certificate of Analysis for each shipment. The QC laboratory is at the Moniya, Ibadan plant. See Certifications & Quality and the sample Certificate of Analysis.

Free fatty acid is what moisture drives. Peroxide value rises as a second-order effect. Colour can look cloudy when water is dispersed. Melting point is not changed by water — a common misconception.

Shea Butter Specifications

FFA, peroxide value, moisture, refractive index, saponification value and more.

Complete Guide to Shea Butter

Master reference — grades, production, specifications, uses, sourcing, importing.

Shea Butter Grades

Grade A, B and C unrefined shea butter and refined N-RBD explained.

Free Fatty Acid (FFA)

What FFA measures in shea butter, why it rises in kernels, and how it is tested.

Peroxide Value (PV)

Peroxide value as the first oxidation marker in shea butter storage.

Colour Grading

Colour as an appearance specification, not a grade.

Melting Point

Slip melting point and how it governs shea butter skin feel.

COA Interpreter

Check a moisture result against published bands.

Shea Butter Grade Checker

Check whether COA values sit in Grade A, B or C bands.

Certificate of Analysis (sample)

How a batch is reported.

Refined N-RBD Shea Butter

Vacuum deodorisation leaves refined butter very dry.

Frequently asked questions

References & standards

AOCS Official Method Ca 2c-25 — Moisture and Volatile Matter, Air Oven Method — American Oil Chemists' Society
AOCS Official Method Ca 2b-38 — Moisture and Volatile Matter, Hot Plate Method — American Oil Chemists' Society
ISO 662 — Animal and vegetable fats and oils — Determination of moisture and volatile matter content — International Organization for Standardization
ISO 8534 — Animal and vegetable fats and oils — Determination of water content — Karl Fischer method — International Organization for Standardization
Honfo, F.G. et al. (2014). Nutritional composition of shea products and chemical properties of shea butter: a review — Critical Reviews in Food Science and Nutrition

Last reviewed September 2026 by EMI Agro Industries QC team.

Manufacturer-direct from Ibadan, Nigeria

Specify the moisture limit you need — we'll show you the COA.

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