Carbonic acid

Carbonic acid (0.03 Mol; until protoplasmic movement ceased) induces cessation of protoplasmic streaming in Tradescantia virginica anther hair cells at a mean intracellular pH of 4.5, equivalent to the cells' normal baseline pH^[2].
Carbonic acid (0.03 Mol; 25 min-3 hours) induces reversible cessation of protoplasmic streaming in Tradescantia virginica anther hair cells, with full reversibility after exposures up to 1 hour and partial reversibility after 3 hours^[2].
Carbonic acid (0.03 Mol; 1 hour, followed by 1 hour air exposure) exerts a reversible narcotic effect on Tradescantia virginica anther hair cells, with all cells resuming normal protoplasmic streaming after removal of the acid^[2].
Carbonic acid is toxic to Paramaecium caudatum, causing complete loss of motility within 10 to 55 minutes depending on medium pH, with intracellular acidification of vacuoles preceding protoplasmic acidification and death^[2].
Carbonic acid forms rapidly via photo-triggered deuteron transfer to bicarbonate in buffered D₂O solution (pD=8) with an on-contact transfer time of 8 ps, has a deprotonation rate of 280,000 ps, and exhibits an acidity constant pK_a of 3.45, with no observable decomposition to CO₂ on the nanosecond timescale^[3].
Carbonic acidforms upon rapid acidification, and decomposes to carbon dioxide with a measurable rate observable via continuous-flow Raman spectroscopy^[3].
Carbonic acid forms in solid CO₂-H₂O ice mixtures after irradiation with 700 keV protons, high-flux UV radiation, or ion implantation, demonstrating relevance to astrophysical cryogenic environments^[3].

MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.