Organic Acids

Organic acids are ubiquitous throughout the field of chemistry. Whether used as a solvent, a substrate, a strong acid, or in a catalytic amount as a Bronsted acid source, organic acids are as commonplace as glassware for the researcher.

Sigma-Aldrich provides a vast array of common organic acids, from acetic acid to triflic acid, as well as their isotopically enriched counterparts. Many variations of deuterated organic acids are available for simple deuterium exchange reactions or more involved kinetic experiments. We also offer a wide range of mineral acids and various inorganic and organic bases to complement our acid selections listed here.

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Molecular Formula

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320099 Acetic acid ACS reagent, ≥99.7% C2H4O2
695092 Acetic acid ACS reagent, ≥99.7% C2H4O2
A6283 Acetic acid ReagentPlus®, ≥99% C2H4O2
338826 Acetic acid ≥99.99% trace metals basis C2H4O2
07692 Acetic acid TraceSELECT® Ultra, for ultratrace analysis, ≥99.0% C2H4O2
45727 Acetic acid TraceSELECT®, for trace analysis, ≥99.0% C2H4O2
45731 Acetic acid puriss. p.a., ACS reagent, indiff. against chromic acid, ≥99.8% (GC/T) C2H4O2
45726 Acetic acid for luminescence, BioUltra, ≥99.5% (GC/T) C2H4O2
49199 Acetic acid eluent additive for LC-MS C2H4O2
71251 Acetic acid analytical standard C2H4O2
33209 Acetic acid puriss. p.a., ACS reagent, reag. ISO, reag. Ph. Eur., ≥99.8% C2H4O2
33206 Acetic acid Analytical Reagent, ≥96% C2H4O2
27225 Acetic acid puriss., meets analytical specification of Ph. Eur., BP, USP, FCC, 99.8-100.5% C2H4O2
27221 Acetic acid puriss., 99-100% C2H4O2
45740 Acetic acid ≥99.0% (T) C2H4O2
45741 Acetic acid tested according to Ph.Eur. C2H4O2
W200603 Acetic acid natural, ≥99.5%, FG C2H4O2
W200611 Acetic acid ≥99.5%, FCC, FG C2H4O2
45754 Acetic acid solution for HPLC C2H4O2
34254 Acetic acid solution volumetric, 0.1 M CH3COOH (0.1N) C2H4O2
34255 Acetic acid solution volumetric, 0.5 M CH3COOH (0.5N) C2H4O2
34256 Acetic acid solution volumetric, 1.0 M CH3COOH (1.0N) C2H4O2
151777 Acetic acid-d 99 atom % D C2H3DO2
279285 Acetic acid-1-13C 99 atom % 13C 13CCH4O2
606766 Acetic acid-12C2 99.9 atom % 12C 12C2H4O2
282022 Acetic acid-13C2 99 atom % 13C 13C2H4O2
279307 Acetic acid-2-13C 99 atom % 13C 13CCH4O2
491640 Acetic acid-17O2 20 atom % 17O C2H417O2
487791 Acetic acid-18O2 95 atom % 18O C2H418O2
299073 Acetic acid-2-13C,2,2,2-d3 99 atom % D, 99 atom % 13C 13CCD3HO2
487856 Acetic acid-2,2,2-d3 99 atom % D C2D3HO2
607401 Acetic acid-13C2,d4 98 atom % D, 99 atom % 13C 13C2D4O2
577855 Acetic acid-2-13C,d4 99 atom % 13C, 98 atom % D 13CCD4O2
613061 Acetic acid-d4 "100%", 99.96 atom % D C2D4O2
233315 Acetic acid-d4 99.9 atom % D C2D4O2
151785 Acetic acid-d4 99.5 atom % D C2D4O2
416886 Acetic acid-d4 99.5 atom % D, contains 0.03 % (v/v) TMS C2D4O2
ARK2183 Acetic acid, glacial PharmaGrade, USP, JP, Ph Eur, Manufactured under appropriate GMP controls for pharma or biopharmaceutical production. C2H4O2
691275 Acetic anhydride Lonza quality, ≥99.5% (GC) C4H6O3
01-0390 Acetic anhydride SAJ first grade, ≥93.0% C4H6O3
01-0380 Acetic anhydride JIS special grade C4H6O3
127442 Aminomethanesulfonic acid 97% CH5NO3S
10680 Anthranilic acid puriss. p.a., ≥99.5% (T) C7H7NO2
A89855 Anthranilic acid reagent grade, ≥98% C7H7NO2
33034 L-Ascorbic acid puriss. p.a., ACS reagent, reag. ISO, reag. Ph. Eur., 99.7-100.5% (oxidimetric) C6H8O6
255564 L-Ascorbic acid ACS reagent, ≥99% C6H8O6
185698 Barbituric acid ReagentPlus®, 99% C4H4N2O3
12635 Benzenesulfonic acid 98.0% (T) C6H6O3S
12640 Benzenesulfonic acid technical, ≥90% (T) C6H6O3S
135070 Benzenesulfonic acid technical grade, 90% C6H6O3S
448737 Benzenesulfonic acid monohydrate 97% C6H6O3S · H2O
242381 Benzoic acid ACS reagent, ≥99.5% C7H6O2
33045 Benzoic acid for calorimetrical determination (approx. 26460 J/g) C7H6O2
33047 Benzoic acid puriss. p.a., ACS reagent, reag. Ph. Eur., ≥99.9% (alkalimetric) C7H6O2
18102 Benzoic acid meets analytical specification of Ph. Eur., BP, USP, FCC, E210, 99.5-100.5% (alkalimetric) C7H6O2
12356 Benzoic acid tested according to Ph.Eur. C7H6O2
427608 Benzoic acid purified by sublimation, ≥99% C7H6O2
109479 Benzoic acid ReagentPlus®, 99% C7H6O2
B9300 Benzophenone ReagentPlus®, 99% C13H10O
757683 Bis(trifluoromethanesulfonyl)methane 97% C3H2F6O4S2
259357 Bromoacetic acid ReagentPlus®, ≥99% C2H3BrO2
B56307 Bromoacetic acid reagent grade, 97% C2H3BrO2
17000 Bromoacetic acid ReagentPlus®, ≥99.0% C2H3BrO2
17010 Bromoacetic acid purum, ≥98.0% (T) C2H3BrO2
279331 Bromoacetic acid-1-13C 99 atom % 13C 13CCH3BrO2
595810 Bromoacetic acid-1-13C,18O2 99 atom % 13C, 95 atom % 18O, 97% (CP) 13CCH3Br18O2
283835 Bromoacetic acid-13C2 99 atom % 13C 13C2H3BrO2
279358 Bromoacetic acid-2-13C 99 atom % 13C 13CCH3BrO2
597031 Bromoacetic acid-18O2 95 atom % 18O, 97% (CP) C2H3Br18O2
607525 Bromoacetic acid-13C2,d3 99 atom % 13C, 98 atom % D 13C2D3BrO2
488224 Bromoacetic acid-d3 98 atom % D C2D3BrO2
537500   Bromoacetic acid, polymer-bound 100-200 mesh, extent of labeling: 0.85-1.2 mmol/g loading, 1 % cross-linked with divinylbenzene  
389633 Bromochloroacetic acid 97% C2H2BrClO2
617504 Bromochloroacetic acid-1-13C 99 atom % 13C, 97% (CP) 13CCH2BrClO2
604259 Bromodichloroacetic acid-1-13C 99 atom % 13C, 98% (CP) 13CCHBrCl2O2
147923 Camphor-10-sulfonic acid (β) 98% C10H16O4S
21370 (±)-Camphor-10-sulfonic acid purum, ≥98.0% (T) C10H16O4S
402923 Chloroacetic acid ACS reagent, ≥99.0% C2H3ClO2
C19627 Chloroacetic acid 99% C2H3ClO2
24510 Chloroacetic acid puriss., ≥99.0% (T) C2H3ClO2
24520 Chloroacetic acid purum, ≥97.0% (T) C2H3ClO2
488496 Chloroacetic acid-1-13C 99 atom % 13C 13CCH3ClO2
488518 Chloroacetic acid-13C2 99 atom % 13C 13C2H3ClO2
615404 Chloroacetic acid-d3 98 atom % D C2D3ClO2
604267 Chlorodibromoacetic acid-1-13C 99 atom % 13C, 97% (CP) 13CCHBr2ClO2
C34200 Chlorodifluoroacetic acid 98% C2HClF2O2
251275 Citric acid ACS reagent, ≥99.5% C6H8O7
C83155 Citric acid 99% C6H8O7
C0759 Citric acid 99% C6H8O7
C1909 Citric acid monohydrate ACS reagent, ≥99.0% C6H8O7 · H2O
C7129 Citric acid monohydrate reagent grade, ≥98% (GC/titration) C6H8O7 · H2O
27813 Coomassie protein assay reagent  
28270 Curing Agent C Fluka ≥95.0% (NT) C7H8O3S · C4H9NO
242357 Dibromoacetic acid 97% C2H2Br2O2
604224 Dibromoacetic acid-1-13C 99 atom % 13C, 97% (CP) 13CCH2Br2O2
634522 Dichloroacetic acid biotech. grade, ≥98% C2H2Cl2O2
D54702 Dichloroacetic acid ReagentPlus®, ≥99% C2H2Cl2O2
49431 Dichloroacetic acid solution for DNA synthesis, 3% in methylene chloride C2H2Cl2O2
604232 Dichloroacetic acid-1-13C 99 atom % 13C, 97% (CP) 13CCH2Cl2O2
485470 Dichloroacetic acid-d2 98 atom % D C2D2Cl2O2
485489 Dichloroacetic acid-2-13C 99 atom % 13C 13CCH2Cl2O2
142859 Difluoroacetic acid 98% C2H2F2O2
761117 Dimethylformamidium trifluoromethanesulfonate 97% C4H8F3NO4S
03620 Ethylenediaminetetraacetic acid ≥98.0% (KT) C10H16N2O8
F8798 Folic acid meets USP testing specifications C19H19N7O6
399388 Formic acid ACS reagent, 88-91% Green Alternative CH2O2
F0507 Formic acid reagent grade, ≥95% CH2O2
06440 Formic acid puriss. p.a., ~98% (T) CH2O2
33015 Formic acid puriss. p.a., ACS reagent, reag. Ph. Eur., ≥98% CH2O2
27001 Formic acid puriss., meets analytical specifications of DAC, FCC, 98.0-100% CH2O2
27002 Formic acid purum, ≥85% CH2O2
06454 Formic acid ≥88.0%, TraceSELECT®, for trace analysis CH2O2
695076 Formic acid ACS reagent, ≥96% CH2O2
09676 Formic acid solution puriss. p.a., for HPLC, 50% in water, 49-51% (T) CH2O2
06561 Formic acid triethylamine complex 5:2 ≥99.0% (NT) Green Alternative CH2O2 · 0.4C6H15N
47910 Fumaric acid purum, ≥99.0% (T) C4H4O4
03761 Fumaric acid USP/NF C4H4O4
240745 Fumaric acid ≥99% C4H4O4
F19353 Fumaric acid 99% C4H4O4
398225 Gallic acid monohydrate ACS reagent, ≥98.0% C7H6O5 · H2O
48630 Gallic acid monohydrate purum, ACS reagent, ≥98.0% (HPLC) C7H6O5 · H2O
A9967 Glacial acetic acid meets USP testing specifications C2H4O2
124737 Glycolic acid ReagentPlus®, 99% C2H4O3
50590 Glycolic acid ≥97.0% (T) C2H4O3
57840 Iodoacetic acid ≥98.0% (T) C2H3IO2
604119 Iodoacetic acid-1-13C 99 atom % 13C 13CCH3IO2
595489 Iodoacetic acid-13C2 99 atom % 13C 13C2H3IO2
604100 Iodoacetic acid-2-13C 99 atom % 13C 13CCH3IO2
L6661 Lactic acid meets USP testing specifications C3H6O3
252476 Lactic acid solution ACS reagent, ≥85% C3H6O3
27715 L-(+)-Lactic acid 80% C3H6O3
69773 L-(+)-Lactic acid solution ACS reagent, 85-90% (L-lactic acid in water) C3H6O3
27714 L-(+)-Lactic acid solution meets analytical specification of Ph. Eur., BP, 88-92% total acid basis C3H6O3
62320 (±)-α-Lipoic acid ≥98.0% C8H14O2S2
603996 Lithium acetate-13C2 99 atom % 13C 13C2H3LiO2
63189 Maleic acid Ph Eur C4H4O4
M0375 Maleic acid ReagentPlus®, ≥99.0% (HPLC) C4H4O4
M8304 Malic acid meets USP/NF testing specifications C4H6O5
M1296 Malonic acid ReagentPlus®, 99% C3H4O4
64280 Methanesulfonic acid CH4O3S
471356 Methanesulfonic acid ≥99.5% CH4O3S
64290 Methanesulfonic acid solution technical, ~70% in H2O CH4O3S
471348 Methanesulfonic acid solution 70 wt. % in H2O CH4O3S
72560 Nitrilotriacetic acid ACS reagent, ≥99.0% C6H9NO6
398144 Nitrilotriacetic acid ACS reagent, for complexometry, ≥98% C6H9NO6
75688 Oxalic acid puriss. p.a., anhydrous, ≥99.0% (RT) C2H2O4
247537 Oxalic acid dihydrate ACS reagent, ≥99% C2H2O4 · 2H2O
O0376 Oxalic acid dihydrate ReagentPlus®, ≥99.0% (GC) C2H2O4 · 2H2O
33506 Oxalic acid dihydrate puriss. p.a., ACS reagent, reag. ISO, reag. Ph. Eur., ≥99.5% (manganometric) C2H2O4 · 2H2O
75702 Oxalic acid dihydrate purum p.a., ≥99.0% (RT) C2H2O4 · 2H2O
27725 Oxalic acid dihydrate puriss., ≥99% C2H2O4 · 2H2O
P0625 Palmitic acid Grade II, ~95% C16H32O2
76122 Palmitic acid purum, ≥98.0% (GC) C16H32O2
77240 Peracetic acid solution purum, ~39% in acetic acid (RT) C2H4O3
269336 Peracetic acid solution 32 wt. % in dilute acetic acid C2H4O3
80010 Phthalic acid puriss. p.a., ≥99.5% (T) C8H6O4
402915 Phthalic acid ACS reagent, ≥99.5% C8H6O4
P39303 Phthalic acid reagent grade, 98% C8H6O4
402907 Propionic acid ACS reagent, ≥99.5% C3H6O2
81910 Propionic acid puriss. p.a., ≥99.5% (GC) C3H6O2
82803 Pyridine hydrochloride polymer-bound extent of labeling: ~6.5 mmol/g Cl loading  
82815 Pyridinium p-toluenesulfonate puriss., ≥99.0% (T) C12H13NO3S
232238 Pyridinium p-toluenesulfonate 98% C12H13NO3S
S5922 Salicylic acid BioXtra, ≥99.0% C7H6O3
247588 Salicylic acid ACS reagent, ≥99.0% C7H6O3
84210 Salicylic acid puriss. p.a., ≥99.0% (T) C7H6O3
27301 Salicylic acid meets analytical specification of Ph. Eur., BP, USP, 99.5-100.5% (calc. to the dried substance) C7H6O3
84211 Salicylic acid Ph Eur C7H6O3
105910 Salicylic acid ReagentPlus®, ≥99% C7H6O3
C0909 Sodium citrate tribasic dihydrate suitable for amino acid analysis, ≥98% (titration), powder C6H5Na3O7 · 2H2O
82070 Sorbic acid tested according to Ph.Eur. C6H8O2
S1885 Suberic acid bis(N-hydroxysuccinimide ester) ≥95%, powder C16H20N2O8
398055 Succinic acid ACS reagent, ≥99.0% C4H6O4
14079 Succinic acid puriss. p.a., ACS reagent, ≥99.5% (T) C4H6O4
14080 Succinic acid purum p.a., ≥99.0% (T) C4H6O4
27616 Succinic acid puriss., ≥99% (alkalimetric) C4H6O4
242772 Sulfamic acid ReagentPlus®, ≥99% H3NO3S
242780 Sulfamic acid reagent grade, 98% H3NO3S
86042 Sulfamic acid ≥99.0% (T) H3NO3S
S5643 Sulfanilic acid ACS reagent, 98.0-102.0% C6H7NO3S
86090 Sulfanilic acid puriss. p.a., ≥99.0% (T) C6H7NO3S
251917 Sulfanilic acid ACS reagent, 99% C6H7NO3S
S7422 5-Sulfosalicylic acid dihydrate BioXtra, ≥99.0% C7H6O6S · 2H2O
247006 5-Sulfosalicylic acid dihydrate ACS reagent, ≥99% C7H6O6S · 2H2O
S2130 5-Sulfosalicylic acid dihydrate ReagentPlus®, ≥99% C7H6O6S · 2H2O
86195 5-Sulfosalicylic acid dihydrate purum p.a., ≥98.0% (T) C7H6O6S · 2H2O
403040 Tannic acid ACS reagent C76H52O46
96311 Tannic acid tested according to Ph.Eur. C76H52O46
T0200 Tannic acid Source: Chinese natural gall nuts (from grass) C76H52O46
251380 L-(+)-Tartaric acid ACS reagent, ≥99.5% C4H6O6
T109 L-(+)-Tartaric acid ≥99.5% C4H6O6
95309 L-(+)-Tartaric acid puriss. p.a., ACS reagent, ≥99.5% C4H6O6
33801 L-(+)-Tartaric acid puriss. p.a., reag. ISO, reag. Ph. Eur., 99.5-101.0% (calc. to the dried substance) C4H6O6
95310 L-(+)-Tartaric acid ≥99.5% (T) C4H6O6
T30805 Thioacetic acid 96% C2H4OS
T3758 Thioglycolic acid ≥98% C2H4O2S
402885 p-Toluenesulfonic acid monohydrate ACS reagent, ≥98.5% C7H8O3S · H2O
T35920 p-Toluenesulfonic acid monohydrate ReagentPlus®, ≥98% C7H8O3S · H2O
161993 p-Toluenesulfonic acid monohydrate reagent grade, 98% C7H8O3S · H2O
89760 p-Toluenesulfonic acid monohydrate puriss., for acetyl determination, ≥98.5% (T) C7H8O3S · H2O
89762 p-Toluenesulfonic acid monohydrate ≥98.0% (T), ≥98.0% (HPLC) C7H8O3S · H2O
27815 Toluenesulfonic acid mixture of isomers monohydrate mixture of isomers, ≥99% isomers basis (calc. to H2O free subst.) C7H8O3S · H2O
532312 p-Toluenesulfonic acid, polymer-bound Macroporous, 30-60 mesh, extent of labeling: 2.0-3.0 mmol/g loading  
T48208 Tribromoacetic acid 99% C2HBr3O2
604240 Tribromoacetic acid-1-13C 99 atom % 13C, 98% (CP) 13CCHBr3O2
T6399 Trichloroacetic acid ACS reagent, ≥99.0% C2HCl3O2
T4885 Trichloroacetic acid ≥99.0% (titration) C2HCl3O2
T8657 Trichloroacetic acid for electrophoresis, suitable for fixing solution (for IEF and PAGE gels), ≥99% C2HCl3O2
91230 Trichloroacetic acid ACS reagent, for the determination of Fe in blood according to Heilmeyer, ≥99.5% C2HCl3O2
27242 Trichloroacetic acid puriss., meets analytical specification of Ph. Eur., USP 21, 99-100.5% (calc. to the dried substance) C2HCl3O2
91233 Trichloroacetic acid C2HCl3O2
116114 Trichloroacetic acid reagent grade, 98% C2HCl3O2
493457 Trichloroacetic acid-1-13C 99 atom % 13C 13CCHCl3O2
T6508 Trifluoroacetic acid ReagentPlus®, 99% C2HF3O2
302031 Trifluoroacetic acid CHROMASOLV®, for HPLC, ≥99.0% C2HF3O2
91707 Trifluoroacetic acid puriss. p.a., for HPLC, ≥99.0% (GC) C2HF3O2
40967 Trifluoroacetic acid eluent additive for LC-MS C2HF3O2
30-4310 Trifluoroacetic acid SAJ special grade, ≥99.0% C2HF3O2
152005 Trifluoroacetic acid-d 99.5 atom % D C2DF3O2
530514 Trifluoroacetic acid-d 99.5 atom % D C2DF3O2
269778 Trifluoroacetic acid-d 99.5 atom % D C2DF3O2
394300 Trifluoroacetic acid-d 99 atom % D C2DF3O2
347817 Trifluoromethanesulfonic acid ReagentPlus®, ≥99% CHF3O3S
158534 Trifluoromethanesulfonic acid reagent grade, 98% CHF3O3S
91738 Trifluoromethanesulfonic acid purum, ≥98.0% (T) CHF3O3S
35317 Trifluoromethanesulfonic acid solution volumetric, 0.1 M CF3SO3H in acetic acid (0.1N), for titration in non-aqueous medium CHF3O3S
369632 Trifluoromethanesulfonic acid-d 98 atom % D CDF3O3S
657034 Triphenylphosphine hydrobromide, polymer-bound 200-400 mesh particle size, extent of labeling: 2.5-3.0 mmol/g Br loading, 2 % cross-linked with divinylbenzene