Incroquat BTMS-50, cetrimonium chloride, hydrolyzed proteins, cationic polymers, hydrosols, and so on - have pH levels at 7 or lower, with most below 6. When we combine these ingredients together with water, we'll have a product with a pH below 6 or an acidic product.
Why do we want acidic hair care products? Because our hair has an acidic pH. The more virgin your hair - meaning the less you've dyed, straightened, permed, or relaxed it chemically - the more acidic it is with really virgin hair registering around 3.7.
An aside: This is one of the reasons you don't want to use cold process soap on your hair. It's alkaline, with a pH above 8, which our hair doesn't really like. There are some people who can use it, but the majority will find an alkaline product makes their hair feel matted, dull, and scratchy after use.
pH meters are well worth the investment if you're someone who wants to make loads of products! (If you want to make anti-aging lotions and potions with AHAs, this is a great investment!) Here are a few you might want to consider...
Lotioncrafter (US only)
The Herbarie (US, might ship to Canada?)
Amazon (US, might ship to Canada?)
How conditioners work!
Quick summary about damaged hair
Definition of good condition
Absorption and substantivity of conditioners