Yes, you’ll need to ensure the products are safe (particularly given the nature of the products) – there are consumer and other laws that require the products to be safe (e.g. Consumer Guarantees Act and Fair Trading Act). The products will need to comply with product safety standards as you’ve identified – click here for more information from the Commerce Commission, and here to search standards available through Standards NZ.
There are product testing services in New Zealand, for example click here for SGS.
I hope that helps.