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Inorganic Acids

One of the most commonly used product groupings in synthesis are inorganic acids. These products are used in a wide range of applications from serving as feedstock in commercial use to making stock solutions for workup procedures. The Sigma-Aldrich portfolio of inorganic acids spans products with various acidity (pKa values measured in water):
  • Hydrogen Halides (pKa ∼ 3.17, -8.0, -9.0 for HF, HCl, HBr)
  • Boric Acid (pKa ∼ 9.23)
  • Nitric Acid (pKa ∼ -1.3)
  • Phosphoric Acid (pKa ∼ 2.12, 7.21, 12.32)
  • Sulfuric Acid (pKa ∼ -3.0, 1.99)

Since most inorganic acids can be highly corrosive, accidents involving a spill can be catastrophic. However, one of the salient features of some of our products is that Sigma-Aldrich® provides certain inorganic acids in shatter-resistant, high-density polyethylene (HDPE) bottles. This packaging helps to avoid some of the shock from accidentally dropping the bottle and helps to contain the spill. Other advantages to our HDPE bottles are that they are recyclable and can afford some inorganic acids to be shipped in case packs.

Search below for the inorganic acids to fit your research needs.

Product #

Image

Description

Molecular Formula

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B0394 Boric acid ACS reagent, ≥99.5% H3BO3
B0252 Boric acid ReagentPlus®, ≥99.5% H3BO3
31146 Boric acid puriss. p.a., ACS reagent, reag. ISO, reag. Ph. Eur., buffer substance, ≥99.8% H3BO3
11607 Boric acid puriss., meets analytical specification of Ph. Eur., BP, NF, 99.5-100.5%, powder H3BO3
206083 Chloroplatinic acid hexahydrate ACS reagent, ≥37.50% Pt basis H2Cl6Pt · 6H2O
P5775 Chloroplatinic acid hexahydrate powder and chunks H2Cl6Pt · 6H2O
571024 Chlorosulfonic acid 99% HClO3S
324744 Fluorophosphoric acid solution 70 wt. % in H2O H2FO3P
01302 Fluosilicic acid purum, 33.5-35% H2F6Si
200956 Hexafluorophosphoric acid solution ~55 wt. % in H2O HF6P
210013 Hydriodic acid contains no stabilizer, distilled, 57 wt. % in H2O, 99.99% trace metals basis HI
210021 Hydriodic acid 57 wt. % in H2O, distilled, stabilized, 99.95% HI
398098 Hydriodic acid contains no stabilizer, ACS reagent, 55% HI
248649 Hydriodic acid contains ≤1.5% hypophosphorous acid as stabilizer, ACS reagent, ≥47.0% HI
58160 Hydriodic acid puriss. p.a., ≥67% (T) HI
50486 Hydriodic acid puriss. p.a., 55-60%, not stabilized, packed in coated, shock- and leak-protected glass bottle HI
339245 Hydrobromic acid 48 wt. % in H2O, ≥99.99% HBr
438065 Hydrobromic acid ACS reagent, 48% HBr
244260 Hydrobromic acid ACS reagent, 48% HBr
268003 Hydrobromic acid reagent grade, 48% HBr
18720 Hydrobromic acid solution purum p.a., ≥62% (T) HBr
18735 Hydrobromic acid solution 33 wt. % in acetic acid HBr
H1758 Hydrochloric acid 36.5-38.0%, BioReagent, for molecular biology HCl
320331 Hydrochloric acid ACS reagent, 37% HCl
258148 Hydrochloric acid ACS reagent, 37% HCl
435570 Hydrochloric acid reagent grade, 37% HCl
07104 Hydrochloric acid puriss., 24.5-26.0% HCl
40233 Hydrochloric acid semiconductor grade PURANAL (Honeywell 17863), ≥32% HCl
30721 Hydrochloric acid puriss. p.a., ACS reagent, reag. ISO, reag. Ph. Eur., fuming, ≥37%, APHA: ≤10 HCl
07102 Hydrochloric acid meets analytical specification of Ph. Eur., BP, NF, fuming, 36.5-38% HCl
84426 Hydrochloric acid purum p.a., fuming 37%, ≥37% (T) HCl
40253 Hydrochloric acid semiconductor grade PURANAL (Honeywell 17823), fuming 37%, 37-38% HCl
339253 Hydrochloric acid 37 wt. % in H2O, 99.999% trace metals basis HCl
84429 Hydrochloric acid solution ~6 M in H2O, for amino acid analysis HCl
H9892 Hydrochloric acid solution 1.0 N, BioReagent, suitable for cell culture HCl
H0636 Hydrochloric acid solution protein sequencing grade, liquid HCl
2104 Hydrochloric acid solution volumetric, 0.1 M HCl (0.1N), endotoxin free HCl
84432 Hydrochloric acid – propionic acid solution 1:1 (v/v), for protein sequence analysis  
339261 Hydrofluoric acid 48 wt. % in H2O, ≥99.99% trace metals basis HF
43319 Hydrofluoric acid for ultratrace analysis, 47-51% (T) HF
30107 Hydrofluoric acid puriss. p.a., ACS reagent, reag. ISO, reag. Ph. Eur., ≥48% HF
30103 Hydrofluoric acid puriss. p.a., reag. ISO, reag. Ph. Eur., ≥40% HF
01066 Hydrofluoric acid technical, 40-45% HF
40276 Hydrofluoric acid semiconductor grade MOS PURANAL (Honeywell 17928), 49.5-50.5% HF
695068 Hydrofluoric acid ACS reagent, 48% HF
295418 Hydrogen bromide ReagentPlus®, ≥99% HBr
248630 Hydrogen bromide solution 33 wt. % in acetic acid HBr
295426 Hydrogen chloride ReagentPlus®, ≥99% HCl
304174 Hydrogen chloride solution 1.0 M in acetic acid HCl
455180 Hydrogen chloride solution 2.0 M in diethyl ether HCl
294837 Hydrogen chloride solution 1.0 M in diethyl ether HCl
345547 Hydrogen chloride solution 4.0 M in dioxane HCl
705551 Hydrogen chloride solution 3 M in cyclopentyl methyl ether (CPME) HCl
213136 Hydroxylamine-O-sulfonic acid 97% H3NO4S
55493 Hydroxylamine-O-sulfonic acid purum, ≥95.0% (RT) H3NO4S
227978 Hydroxylamine-O-sulfonic acid technical grade, 90% H3NO4S
214906 Hypophosphorous acid solution 50 wt. % in H2O H3O2P
58060 Iodic acid puriss. p.a., ACS reagent, ≥99.5% (RT) HIO3
221929 Iodic acid ACS reagent, ≥99.5% HIO3
07404 Jone′s reagent ~2% CrO3 basis  
175080 Magic Acid 100% HF6O3SSb
232084 Molybdic acid ≥85.0% MoO3 basis, ACS reagent  
438073 Nitric acid ACS reagent, 70% HNO3
225711 Nitric acid 70%, purified by redistillation, ≥99.999% trace metals basis HNO3
309079 Nitric acid red, fuming, HNO3 >90 % HNO3
84392 Nitric acid purum p.a., fuming, packed in coated, shock- and leak-protected glass bottle, ≥99% (T) HNO3
84378 Nitric acid puriss. p.a., 65% (Hg ≤0.0000005%), ≥65% (T) HNO3
84380 Nitric acid puriss. p.a., ≥65% (T) HNO3
30709 Nitric acid puriss. p.a., reag. ISO, reag. Ph. Eur., for determinations with dithizone, ≥65% HNO3
40230 Nitric acid semiconductor grade PURANAL (Honeywell 17818), ≥65% HNO3
40222 Nitric acid semiconductor grade PURANAL (Honeywell 17952), ≥69% HNO3
40280 Nitric acid semiconductor grade MOS PURANAL (Honeywell 17920), ≥69% HNO3
695025 Nitric acid reagent grade, fuming, >90% HNO3
695041 Nitric acid ACS reagent, ≥90.0% HNO3
695033 Nitric acid ACS reagent, 70% HNO3
517070 Nitrosylsulfuric acid solution 40 wt. % in sulfuric acid HNO5S
244252 Perchloric acid ACS reagent, 70% HClO4
311413 Perchloric acid ACS reagent, 60% HClO4
77234 Perchloric acid puriss. p.a., ACS reagent, packed in coated, shock- and leak-protected glass bottle, ≥60% (T) HClO4
77228 Perchloric acid puriss. p.a., ACS reagent, 70% (Hg ≤0.0000005%), packed in coated, shock- and leak-protected glass bottle, ≥69% (T) HClO4
30755 Perchloric acid puriss. p.a., ACS reagent, reag. ISO, reag. Ph. Eur., 70.0-72.0% HClO4
375810 Periodic acid ACS reagent, 99% H5IO6
P7875 Periodic acid ReagentPlus®, ≥99.0% H5IO6
77310 Periodic acid puriss. p.a., ACS reagent, for oxidimetric titration, crystallized, ≥99.0% (RT) H5IO6
431400 Phosphomolybdic acid hydrate ≥99.99% trace metals basis H3Mo12O40P · xH2O
221856 Phosphomolybdic acid hydrate ACS reagent H3Mo12O40P · xH2O
P7390 Phosphomolybdic acid hydrate moist crystals H3Mo12O40P · xH2O
319279 Phosphomolybdic acid solution 20 wt. % in ethanol H3Mo12O40P
P5811 Phosphoric acid BioReagent, suitable for insect cell culture, 85% H3O4P
438081 Phosphoric acid ACS reagent, ≥85 wt. % in H2O Green Alternative H3O4P
79622 Phosphoric acid puriss. p.a., crystallized, ≥99.0% (T) H3O4P
30417 Phosphoric acid puriss. p.a., ACS reagent, reag. ISO, reag. Ph. Eur., ≥85% H3O4P
04102 Phosphoric acid puriss., ≥99% H3O4P
04107 Phosphoric acid puriss., meets analytical specification of Ph. Eur., BP, NF, FCC, 85.0-88.0% H3O4P
40278 Phosphoric acid semiconductor grade MOS PURANAL (Honeywell 17938), ≥85% H3O4P
40266 Phosphoric acid semiconductor grade PURANAL (Honeywell 17861), ≥85% H3O4P
695017 Phosphoric acid ACS reagent, ≥85 wt. % in H2O H3O4P
04103 meta-Phosphoric acid 100%, lumps (glassy)  
M6288 meta-Phosphoric acid BioXtra, ≥33.5%  
79615 meta-Phosphoric acid purum, ~65% HPO3 basis, pieces  
79613 meta-Phosphoric acid puriss. p.a., ACS reagent, ≥33.5% (T)  
239275 meta-Phosphoric acid ACS reagent, chips, 33.5-36.5%  
215112 Phosphorous acid 99% H3O3P
04115 Phosphorous acid solution ≥50% H3O3P
P4006 Phosphotungstic acid hydrate reagent grade H3O40PW12 · xH2O
04101 Polyphosphoric acid ≥83% phosphate (as P2O5) basis  
208213 Polyphosphoric acid reagent grade, 115% H3PO4 basis Green Alternative  
398608 Polyphosphoric acid ~105% H3PO4 basis  
433314 Pyrophosphoric acid technical grade H4O7P2
211176 Selenous acid 98% H2O3Se
708348 Silicomolybdic acid solution  
S150 Spermine–Nitric oxide complex source of nitric oxide C10H26N6O2
481505 Sulfamic acid 99.999% trace metals basis H3NO3S
383120 Sulfamic acid ACS reagent, 99.3% H3NO3S
07401 Sulfamic acid ≥99.5% (alkalimetric) H3NO3S
247626 Sulfur dioxide solution ACS reagent, ≥6% H2O3S
339741 Sulfuric acid 99.999% H2O4S
320501 Sulfuric acid ACS reagent, 95.0-98.0% H2O4S
258105 Sulfuric acid ACS reagent, 95.0-98.0% H2O4S
84720 Sulfuric acid puriss. p.a., 95-97% (T) H2O4S
30743 Sulfuric acid puriss. p.a., for determination of Hg, ACS reagent, reag. ISO, reag. Ph. Eur., 95.0-97.0% H2O4S
07208 Sulfuric acid puriss., meets analytical specification of Ph. Eur., BP, 95-97% H2O4S
84721 Sulfuric acid purum p.a., 95-97% (T) H2O4S
84736 Sulfuric acid solution puriss. p.a., ≥25% (T) H2O4S
84724 Sulfuric acid solution purum, ~30% in H2O H2O4S
28-5930 Sulfuric acid solution 1 M H2O4S
30736 Sulfuric acid, fuming puriss. p.a., 20% SO3 H2O4S
357413 Sulfuric acid, fuming reagent grade, 30% free SO3 basis H2O4S
435597 Sulfuric acid, fuming reagent grade, 20% free SO3 basis H2O4S
778990 Sulfuric acid, fuming reagent grade, 65.5-68.0% free SO3 basis (with NaOH) H2O4S
207934 Tetrafluoroboric acid solution 48 wt. % in H2O HBF4
400068 Tetrafluoroboric acid diethyl ether complex C4H11BF4O
81345 Trimethylsilyl polyphosphate  
383341 Tungstosilicic acid hydrate ≥99.9% trace metals basis H4O40SiW12 · xH2O
T2786 Tungstosilicic acid hydrate H4O40SiW12 · xH2O
95395 Tungstosilicic acid hydrate purum p.a. H4O40SiW12 · xH2O