Vitamin B5 (Pantothenic Acid) forms for supplement manufacturing

How the forms compare

Calcium D-pantothenate is the usual vitamin B5 source in EU food supplements and the form SoleChem supplies. It is the calcium salt of D-pantothenic acid, listed in Annex II of Directive 2002/46/EC. Other pantothenate sources exist. The table sets them side by side for reference only.

The formula C9H17NO5·½Ca is written per pantothenate unit. The molar mass of 476.5 g/mol refers to the whole salt, which carries two pantothenate anions per calcium ion. Use the whole-salt basis when you convert between salt mass and pantothenic acid.

The label declares pantothenic acid, not the weight of the salt. The conversion factor and the batch assay together give the powder mass you weigh. Both figures appear on the specification sheet and certificate of analysis that come with the quote.

Only the D-enantiomer is named in Annex II. Racemic DL-calcium pantothenate is a separate material. Check that the specification and certificate of analysis identify the D-form before you approve a supplier lot.

Choosing a form

With calcium D-pantothenate as the established form, most decisions concern grade, format and handling rather than the choice of salt.

• Label claim and powder mass. Divide the pantothenic acid claim by the pantothenic acid fraction and the batch assay from the certificate of analysis. The elemental content calculator handles this step, and the overage calculator adds the shelf-life allowance.
• Share of the fill. In most multivitamin formulas it is a minor component by mass compared with mineral salts. Fill volume or tablet mass is rarely limited by this ingredient alone.
• Tablets and capsules. The powder blends well in dry mixes for tablets and capsules. Content uniformity matters more than flow because the quantity per unit is small.
• Powders and effervescent tablets. Its water solubility suits powders and sports nutrition and effervescent tablets. Moisture control during effervescent processing protects both the acid-carbonate couple and the vitamin.
• Gummies. In gummies, the acidic matrix and cooking temperatures place stress on the vitamin. Add it late in the process where possible and set the overage from stability data.
• Hygroscopicity. Calcium D-pantothenate takes up moisture from the air. Keep containers closed, dispense in low humidity, and consider a flow aid such as silicon dioxide in powder blends.
• Taste. The salt has a slightly bitter taste. This matters in unflavoured powders, chewables and gummies more than in capsules or coated tablets.
• Stability. The dry solid keeps well when protected from moisture. In solution it hydrolyses faster under strongly acidic or alkaline conditions and at raised temperature.
• Premix or neat. It is often supplied to the line within a B-complex premix with thiamine, riboflavin and vitamin B6. A premix makes small quantities easier to distribute evenly.
• Cost. As the established commodity form, it is usually the most economical pantothenic acid source per milligram.

The salt also brings some calcium into the formula. Its contribution is small next to dedicated calcium forms, but include it in your calcium calculation if the product declares calcium. Ask for the grade you need in the quote form.

EU regulatory status

Pantothenic acid appears in Annex I of Directive 2002/46/EC, the list of vitamins that may be used in food supplements. Calcium D-pantothenate appears in Annex II, the list of permitted vitamin substances. Sodium D-pantothenate, dexpanthenol and pantethine are also listed there. The permitted forms guide explains how the annexes work.

For foods other than supplements, Regulation (EC) No 1925/2006 has its own list of permitted vitamin forms in Annex II. Check that list separately if the same material goes into a fortified food or drink.

On the label, Directive 2002/46/EC requires the amount of pantothenic acid per recommended daily portion in numerical form, in the unit set in Annex I. The amount is also expressed as a percentage of the reference intake, where one is set in Annex XIII of Regulation (EU) No 1169/2011. The labelling guide covers the full set of mandatory particulars.

The EU has not set harmonised maximum amounts of vitamins in food supplements. Member states apply their own maximum levels, and these differ. The competent authority of each member state publishes its rules, and the maximum levels guide explains how to find them.

Any authorised health claims for pantothenic acid, with their conditions of use, are in the EU Register of nutrition and health claims. The health-claims guide explains how Regulation (EC) No 1924/2006 applies to supplements.