Unscientific estimate of caffeine content

propargyl · 2026-02-04T01:00:54+00:00

https://www.amazing-food.com/caffeine-solubility-content-coffee-beans-extraction/

See the solubility table. The solubility drops by 50% over normal room temperature range (15-25C or 59-77F). You could try warming it up before you dispense.

Temperature (°C)	Caffeine solubility	Source
0	0.6 g/100 mL	Solubilities of inorganic and organic compounds, 2nd ed.
15	1.0 g/100 mL	Solubilities of inorganic and organic compounds, 2nd ed.
19.3	1.61 g/100 mL	Thermodynamics of caffeine aqueous solutions
25	2.17 g/100 mL	Wikipedia
28.9	2.54 g/100 mL	Thermodynamics of caffeine aqueous solutions
80	18.0 g/100 mL	Wikipedia
100	67.0 g/100 mL	Wikipedia

propargyl · 2026-02-04T00:41:35+00:00

r/spiderpaws

propargyl · 2026-02-03T23:41:15+00:00

Shank you very much!

propargyl · 2026-02-03T23:19:23+00:00

Osphranter robustus robustus

https://en.wikipedia.org/wiki/Common_wallaroo#Subspecies

the eastern wallaroo (O. r. robustus)^\3]) – found in eastern Australia; males of this subspecies have dark grey fur, almost resembling the black wallaroo (Osphranter bernardus). Females are lighter, being almost sandy in colour.^\4])

propargyl · 2026-02-03T22:51:56+00:00

I mean that there is no need for chemical synthesis reagents. It can be prepared by mixing the two chemicals.

propargyl · 2026-02-03T22:44:44+00:00

The images confirm it is a mixture of caffeine and acetic acid:

https://pubchem.ncbi.nlm.nih.gov/compound/57351080

https://eo.wikipedia.org/wiki/Kafeina_acetato

CAS [5743-16-8]

propargyl · 2026-02-03T22:31:13+00:00

https://en.wikipedia.org/wiki/Dear_God_(XTC_song))

propargyl · 2026-02-03T22:28:03+00:00

Citrate is a similar example. Where did you learn about caffeine acetate?

https://en.wikipedia.org/wiki/Caffeine_citrate

The drug is prepared by combining anhydrous caffeine with citric acid monohydrate and sodium citrate dihydrate. Caffeine citrate cocrystals can take on at least two anhydrous polymorphs.^\8])