When you're choosing skincare products for your business you need to understand what your products shelf life is as well as the exact ingredients of each formula.
That's exactly what a Certificate of Analysis (COA) provides.
So, what is a COA?
A Certificate of Analysis is an official document issued by a third-party or in-house laboratory that confirms the results of testing performed on a specific batch of product. It outlines what was tested, what was found, and whether the product meets pre-defined quality and safety standards.
For a skincare formulation, a COA typically covers:
Microbial testing — confirming the product is free from harmful bacteria, yeast, or mould
pH levels — ensuring the formula is within the safe and effective range for skin
Viscosity / appearance — verifying consistency and texture match the standard
Active ingredient levels — where applicable, confirming the stated actives are present at the right concentration
Preservative efficacy — showing the formulation can resist contamination over time
Why does it matter for you?
Whether you're a retailer, a brand owner, or an end consumer, a COA is your assurance that what's in the bottle is safe, stable, and exactly what it claims to be.
For brand owners and white label buyers, COAs are essential for:
Meeting regulatory requirements (e.g. SAHPRA guidelines in South Africa)
Protecting your customers and your brand reputation
Building credibility with stockists or online platforms
Demonstrating due diligence if a product claim is ever questioned
For consumers, knowing your supplier provides COAs means someone has done the hard work of verification — not just taken a supplier's word for it.
The standard
At Unisex, every formulation in our range is batch-tested and accompanied by a Certificate of Analysis. When you order through us you can request the COA for your products on the product details page.