I usually buy Essential's version although I am sure it is exactly the same product as sold by Clearspring.

I noted on the 500ml bottle, and called Essential to query. It transpires the 250m and 2Lt containers all state on the Nutritional Information panel that there is only a trace of salt.

Tamari is the run off from ageing miso and so has the same ingredients which commonly includes over 6% salt. I would expect there to be over 6% in the liquid as it drains off the miso carrying the hydroscopic (water attracting) salt.

I have confirmed on https://nutritiondata.self.com/facts/legumes-and-legume-products/4391/2 where the average content of sodium per 100g is stated as 5.586g for tamari. At 39% weight of table salt, that would equate to approx 14.5g salt.

Essential have called to say the labelling is indeed wrong and there is 12.5% salt i.e approx 5g per 100ml of sodium in the tamari.

Whilst I was waiting for Essential to call back, I scanned Clearspring stated, unsuccessfully to see if they had detail the salt content, what I did find was that barley is. Clearpsring seem happy to label the tamari gluten free as

"our Organic Tamari Soya Sauce undergoes, eliminates the gluten proteins present in the barley. Following these result, the Coeliac Society has decided to include Clearspring Organic Tamari Soya Sauce in their gluten free directory."

Contrary to Clearsprings's assertion that the tamari is gluten free.
1. trulyglutenfree.co.uk has this to say on the matter

"I have always used the same brand and, thinking of pennies, I recently swapped to Clearspring because they did a 1 litre bottle.

It tasted different, but more importantly, I didn’t feel right on it. I thought I had developed a sudden reaction to prawns because I tend to use tamari to make a kind of Chinese egg fried rice dish with king prawns and I didn’t feel well each time I had it. I was not chuffed."

2.Essential knowing the tamari uses barley do not label the product gluten free, yet neither company notes barley as an ingredient?