It says should be...... Read all 14 pages. Genius.. Read the last sentence you quoted. I don't think you understand. You cherry pick sentences. Making your own meaning. This isn't politics. It's science
from page 9
The effects of the substance on human health. Spray mist or dust may irritate the respiratory tract and cause skin itching and redness. Indigestion of dust or spray causes irritation to esophagus and stomach. Aggravates existing lung and skin medical conditions. Proper guidelines will need to
be developed for application if they do not already exist.
“Concluding remarks
Clearly, potassium silicate is a synthetic because, although the potassium carbonate and sand are mined, they require very high temperature treatment to form potassium silicate, and therefore a significant contribution of fossil fuel or fossil fuel replacement energy.
As a fertilizer, potassium silicate is highly soluble (generally a trait that puts a material in the prohibited grouping) and ‘jolts’ the soil with a rapid release of nutrients, even though the effects of a rapid availability of potassium and silica is not believed to have nearly as profound an impact as other materials such as sodium nitrate (an allowed non-synthetic material, with restrictions). As a source of potassium or silicate for soil fertility, there are several effective non-synthetic, low soluble alternatives (lack of alternatives can mitigate other prohibited traits). Although synthetic silicates of metallic micronutrients have been allowed, they are not allowed as a source of silica, and probably should remain so: the reason for allowing these synthetic metallic silicates is the lack of acceptable materials, not that they are compatible with organic philosophy. The weight of the above evidence puts potassium silicate as a fertilizer in the prohibited column.
As a fungicide, the same concerns about synthetics are present. However the amounts used are much smaller, there is no ‘jolt’ to the soil and, most importantly, effective alternatives are not available. Unfortunately, there is not convincing evidence that potassium silicate will be even as effective as the alternatives, and its mode of action is not understood. These are important considerations. Sulfur and copper are allowed synthetics because, although they have some non-target toxicity and environmental troubles, they have a well-understood mode of action and breakdown products, have been used by organic farmers for a long time, and are proven effective. Potassium silicate does not have significant non-target toxicities, environmental risks or breakdown products, but does have a poorly understood mode of action, a short history of use, and has not been proven widely effective.
Recommendations to the NOSB:
The substance should be listed as a prohibited synthetic on the National List.
However, I encourage the NOSB to reassess the material, perhaps as a restricted synthetic fungicide if, in the future, the mode of action becomes better understood, and much more significant and widespread effectiveness as a fungicide is proved.”
here's more references
Potassium silicate is not listed in the Final Rule. Synthetic silicates of zinc, copper, iron, manganese, molybdenum, selenium, and cobalt are allowed as micronutrient plant or soil amendments in cases of documented soil deficiency (§205.601(j)(6)(ii)). In processing applications, silicon dioxide (SiO2) is an allowed synthetic.
Certification
Domestic certifiers
California Certified Organic Farmers (CCOF) Certification Handbook – Not listed (CCOF 2000).
Idaho Department of Agriculture (ISDA) Organic Food Products Rules – Not listed (Section 02.06.33, 2000).
Texas Department of Agriculture (TDA) Organic Certification and Standards Materials List – Not listed. For processing, allows
silicon dioxide as a floating agent (2000).
Washington Department of Agriculture (WSDA) Organic Crop Production Standards – Not listed (WAC 16-154-070, 2000). Organic Materials Review Institute (OMRI) Generic Materials List – Not listed (2002).”
