...nose﹔ 0.04 to 0.097 ppm: tickling of the throat﹔ 0.06 to 0.3 ppm: itching of the nose and cough, stinging, or dryness of the nose and throat﹔ 0.35 to...
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...nose﹔ 0.04 to 0.097 ppm: tickling of the throat﹔ 0.06 to 0.3 ppm: itching of the nose and cough, stinging, or dryness of the nose and throat﹔ 0.35 to...
