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Date Name Thumbnail Size Description Versions
20:34, 13 March 2024 Barium hydroxide octahydrate.jpg (file) 2.01 MB Barium hydroxide octahydrate crystallized from water. 1
18:17, 5 March 2024 Quinine sulfate solution.jpg (file) 1.68 MB Fluorescence of an acidic solution of quinine (along other related cinchona alkaloids). 1
12:35, 26 January 2024 HCN Pok.jpg (file) 106 KB Liquid anhydrous HCN in an ampoule stabilized with phosphoric acid, prepared by Pok, see https://www.sciencemadness.org/whisper/viewthread.php?tid=160124. 1
08:16, 12 November 2023 Copper perchlorate by Tiget.jpg (file) 1.72 MB Copper(II) perchlorate hexahydrate crystals. Image permission generously granted by Tiget. 1
20:44, 14 August 2023 Dicyandiamid2.jpg (file) 113 KB Crystal aggregates of dicyandiamide/cyanoguanidine after being recrystallized from water, close-up. 1
20:43, 14 August 2023 Dicyandiamide crystal aggregates.jpg (file) 113 KB Crystal aggregates of dicyandiamide/cyanoguanidine after being recrystallized from water. 1
20:43, 14 August 2023 Dicyandiamide initial needles.jpg (file) 159 KB Needle-shaped crystals of dicyandiamide/cyanoguanidine crystallizing from boiled calcium cyanamide fertilizer solution. 1
09:40, 14 August 2023 Sodium chlorate polarized.jpg (file) 2.25 MB Sodium chlorate crystals grown from cooling a pure, slightly supersaturated solution. They are placed between two polarizing filters to show their optical activity. Both enantiomorphic forms are present. 1
14:25, 10 January 2023 Copper I chloride exf community.jpg (file) 1.2 MB Copper(I) chloride prepared by a member of the Ex&F community and used with permission of the author. 1
12:20, 17 August 2022 Chlorine dioxide.jpg (file) 239 KB Chlorine dioxide, screenshot taken from https://www.youtube.com/watch?v=VAIgHgdaHas 1
15:18, 13 August 2022 Singlet oxygen.jpg (file) 521 KB Chemiluminescence of singlet oxygen observed when passing chlorine gas into basic hydrogen peroxide. 1
09:13, 10 September 2021 Nitromethane.jpg (file) 1.36 MB Nitromethane fractionally distilled from RC car fuel. 1
19:48, 9 September 2021 Trimethyl borate methanol azeotrope.jpg (file) 1,011 KB Trimethyl borate/methanol azeotrope distilled from methanol, boric acid and catalytic sulfuric acid. 1
19:47, 9 September 2021 Trimethyl borate flame.jpg (file) 353 KB The trimethyl borate/methanol azeotrope set on fire produces a vibrant green flame. 1
12:01, 7 September 2021 Benzalazine.jpg (file) 1.57 MB Benzalazine, prepared from ammonia, hydrazine sulfate and benzaldehyde and recrystallized from 95% ethanol (doi.org/10.15227/orgsyn.016.0051) 1
15:26, 2 September 2021 Benzoic acid.jpg (file) 1.44 MB Benzoic acid made from sodium benzoate food preservative, recrystallized from water. 1
08:27, 24 August 2021 Liquid chlorine.jpg (file) 1 MB A sample of liquid chlorine. 1
15:28, 25 May 2021 Violuric acid monohydrate.jpg (file) 3.03 MB Violuric acid monohydrate, prepared and photographed by SM user RustyShackleford 1
13:54, 23 May 2021 Zinc oxide.jpg (file) 1.13 MB Commercial zinc oxide 1
13:54, 23 May 2021 Sodium hypophosphite.jpg (file) 1,002 KB Sodium hypophosphite, probably the monohydrate 1
13:53, 23 May 2021 Potassium iodide.jpg (file) 1.03 MB Commercial potassium iodide 1
13:52, 23 May 2021 Formaldehyde.jpg (file) 2.19 MB Commercial 37% aqueous formaldehyde 1
13:51, 23 May 2021 Cobalt sulfate heptahydrate.jpg (file) 1.24 MB Commercial cobalt(II) sulfate heptahydrate, possibly somewhat dehydrated 1
13:50, 23 May 2021 Ammonium carbonate.jpg (file) 1.44 MB Commercial ammonium carbonate 1
12:21, 14 May 2021 Molsieve 3A.jpg (file) 2.19 MB 3Å molecular sieves from a laboratory supplier 1
10:01, 7 May 2021 Aminoguanidine bicarbonate micro 3.jpg (file) 568 KB Commercial aminoguanidine bicarbonate, recrystallized from hot water, microscopic view of a single crystal, approximately 1 mm in length. 1
10:00, 7 May 2021 Aminoguanidine bicarbonate micro 2.jpg (file) 2.71 MB Commercial aminoguanidine bicarbonate, recrystallized from hot water, microscopic view. 1
10:00, 7 May 2021 Aminoguanidine bicarbonate micro 1.jpg (file) 925 KB Commercial aminoguanidine bicarbonate, recrystallized from hot water. 1
09:55, 7 May 2021 Aminoguanidinium bicarbonate zwitterion.png (file) 37 KB   1
07:37, 29 April 2021 Acetophenone frozen.jpg (file) 4.61 MB A drop of frozen commercial acetophenone under a microscope. 1
18:54, 6 March 2021 Calcium cyanamide fertilizer.jpg (file) 1.67 MB Commercial calcium cyanamide fertilzer 1
12:35, 6 March 2021 Galena with pyrite.jpg (file) 2.03 MB Galena ore with pyrite 1
12:35, 6 March 2021 Galena.jpg (file) 1.99 MB Galena ore 1
21:44, 27 February 2021 Trichlorohexahydrotriazine.jpg (file) 1.06 MB 1,3,5-Trichlorohexahydrotriazine, an unstable organic chloramine prepared from hexamine, acetic acid and sodium hypochlorite 1
21:43, 27 February 2021 Dicyandiamide beaker.jpg (file) 1.84 MB Dicyandiamide prepared from CaCN<sub>2</sub>-Ca(OH)<sub>2</sub>-fertilizer, just after crystallization 1
21:42, 27 February 2021 Dicyandiamide.jpg (file) 966 KB Dicyandiamide prepared from CaCN<sub>2</sub>-Ca(OH)<sub>2</sub>-fertilizer 1
21:29, 27 February 2021 Myo Inositol.jpg (file) 1.04 MB Commercial myo-inositol, recrystallized from 50/50 ethanol/water, affording a dihydrate 1
07:27, 14 February 2021 Chlorobutanol sublimed.jpg (file) 1.84 MB Chlorobutanol crystals purified by sublimation, picture taken by Abromination 1
10:35, 29 November 2020 HMTD micro.jpg (file) 361 KB   1
21:32, 5 November 2020 Iron III nitrate nonahydrate.jpg (file) 1.97 MB Commercial sample of iron(III) nitrate nonahydrate 1
21:52, 19 October 2020 Tetraiodobismuthate.jpg (file) 3.16 MB A solution of bismuth(III) with excess potassium iodide forms the orange complex ion tetraiodobismuthate [BiI<sub>4</sub>]<sup>-</sup> 1
21:48, 19 October 2020 Bismuth oxynitrate.jpg (file) 3.48 MB When an acidic solution of bismuth nitrate is diluted in water, bismuth oxynitate precipitates and settles after a while 1
21:45, 19 October 2020 Bismuth nitrate pentahydrate.jpg (file) 307 KB Crystal of bismuth nitrate pentahydrate under the microscope, the crystal is about 3 mm long 1
16:58, 28 September 2020 Vanadium V tetraperoxide.jpg (file) 1.94 MB Solution of a blue V(V) tetraperoxospecies, V(O<sub>2</sub>)<sub>4</sub><sup>3-<sup> 1
16:53, 28 September 2020 Vanadium V oxoperoxide.jpg (file) 1.93 MB Solution of a red V(V) oxoperoxospecies, VO(O<sub>2</sub>)<sup>+</sup> 1
16:51, 28 September 2020 Vanadium V oxodiperoxide.jpg (file) 1.83 MB Solution of a yellow V(V) oxoperoxospecies, VO(O<sub>2</sub>)<sub>2</sub><sup>-</sup> or VO<sub>2</sub>(O<sub>2</sub>)<sub>2</sub><sup>3-</sup> 1
16:45, 28 September 2020 Vanadium IV ions basic.jpg (file) 1.92 MB Solution of V(IV) in basic solution, the red-brown color is due to VO(OH)<sub>3</sub><sup>-</sup> 1
16:43, 28 September 2020 Vanadium IV ions acid.jpg (file) 1.92 MB Solution of V(IV) in HCl, the blue color is due to VO<sup>2+</sup>, made by the oxidation of V(III) with chlorine in acidic solution 1
16:40, 28 September 2020 Vanadium III hydroxide.jpg (file) 1.94 MB Precipitate formed from a solution of VCl<sub>3</sub> and NaOH, likely V(OH)3<sub>3</sub> or a hydrated oxide of V(III) 1
16:38, 28 September 2020 Vanadium III chloride water.jpg (file) 1.75 MB Solution of VCl<sub>3</sub> in water, the brown color is due to various hydrolysed species like VO<sup>+</sup> 1
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