Metanilic acid
- CAS No.
- 121-47-1
- Chemical Name:
- Metanilic acid
- Synonyms
- 3-AMINOBENZENESULFONIC ACID;ANILINE-3-SULFONIC ACID;phenylsulfamic acid;Aminobenzenesulfonic acid;3-SULFOANILINE;aminobenzenesulfonicacid;metanilic;Metanilsure;Metanilc Acid;METANILIC ACID
- CBNumber:
- CB7143612
- Molecular Formula:
- C6H7NO3S
- Molecular Weight:
- 173.19
- MDL Number:
- MFCD00065345
- MOL File:
- 121-47-1.mol
- MSDS File:
- SDS
- TDS File:
- TDS
| Melting point | >300 °C (lit.) |
|---|---|
| Density | 1.69 |
| refractive index | 1.5500 (estimate) |
| storage temp. | Keep in dark place,Inert atmosphere,Room temperature |
| solubility | ethanol: very slightly soluble(lit.) |
| form | Powder |
| pka | 3.73(at 25℃) |
| color | White to grayish-beige |
| Water Solubility | slightly soluble |
| Merck | 14,5927 |
| BRN | 473264 |
| Stability | Stable. Combustible. Incompatible with strong oxidizing agents, acids. |
| InChI | 1S/C6H7NO3S/c7-5-2-1-3-6(4-5)11(8,9)10/h1-4H,7H2,(H,8,9,10) |
| InChIKey | ZAJAQTYSTDTMCU-UHFFFAOYSA-N |
| SMILES | Nc1cccc(c1)S(O)(=O)=O |
| LogP | -2.77 at 21℃ |
| CAS DataBase Reference | 121-47-1(CAS DataBase Reference) |
| EWG's Food Scores | 1 |
| FDA UNII | OT03NUM20P |
| NIST Chemistry Reference | Metanilic acid(121-47-1) |
| EPA Substance Registry System | Metanilic acid (121-47-1) |
| UNSPSC Code | 12352100 |
| NACRES | NA.22 |
SAFETY
Risk and Safety Statements
| Symbol(GHS) |  GHS07 |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Signal word | Warning | |||||||||
| Hazard statements | H302+H312+H332 | |||||||||
| Precautionary statements | P261-P264-P280-P301+P312-P302+P352+P312-P304+P340+P312 | |||||||||
| PPE | dust mask type N95 (US), Eyeshields, Gloves | |||||||||
| Hazard Codes | Xn | |||||||||
| Risk Statements | 20/21/22 | |||||||||
| Safety Statements | 23-28-28A-25 | |||||||||
| RIDADR | 3261 | |||||||||
| WGK Germany | 1 | |||||||||
| RTECS | OY2300000 | |||||||||
| TSCA | TSCA listed | |||||||||
| HazardClass | IRRITANT | |||||||||
| HS Code | 29214200 | |||||||||
| Storage Class | 13 - Non Combustible Solids | |||||||||
| Hazard Classifications | Acute Tox. 4 Dermal Acute Tox. 4 Inhalation Acute Tox. 4 Oral |
|||||||||
| REACH Registrations | Active | |||||||||
| NFPA 704 |
|
Metanilic acid price More Price(31)
| Manufacturer | Product number | Product description | CAS number | Packaging | Price | Updated | Buy |
|---|---|---|---|---|---|---|---|
| Sigma-Aldrich | 165794 | 3-Aminobenzenesulfonic acid 97% | 121-47-1 | 250g | $101 | 2026-04-30 | Buy |
| TCI Chemical | A0265 | 3-Aminobenzenesulfonic Acid >99.0%(T) | 121-47-1 | 25g | $18 | 2026-04-30 | Buy |
| TCI Chemical | A0265 | 3-Aminobenzenesulfonic Acid >99.0%(T) | 121-47-1 | 500g | $78 | 2026-04-30 | Buy |
| ChemScene | CS-W017552 | Metanilic acid ≥98% | 121-47-1 | 1kg | $53 | 2026-06-04 | Buy |
| Biosynth | AAA12147 | 3-Aminobenzenesulfonic acid | 121-47-1 | 0.25g | $250 | 2026-06-04 | Buy |
Metanilic acid Chemical Properties, Uses, Production
Chemical Properties
white powder
Uses
3-Aminobenzenesulfonic acid was used in the synthesis of cytocompatible sulfonated polyanilines. It was used in fabrication of novel glucose biosensor having large active surface area and excellent conductivity.
Uses
Metanilic acid was used in the synthesis of cytocompatible sulfonated polyanilines. It was used in fabrication of novel glucose biosensor having large active surface area and excellent conductivity. It undergoes microbial desulfonation to 3-aminophenol by Pseudomonas sp. strain S-313. It can be used to produce CN3O6(1-)*Cs(1+) and dicesium salt of N-nitrometanilic acid at temperature of 25°C.
Definition
ChEBI: 3-aminobenzenesulfonic acid is an aminobenzenesulfonic acid. It is a conjugate acid of a 3-aminobenzenesulfonate.
Production Methods
Metanilic acid can be obtained by sulfonation of aniline sulfate with oleum and boric acid at 20 – 50 ℃. The yield is 98%. For industrial production, however, nitrobenzene is sulfonated to m-nitrobenzenesulfonic acid, which is then reduced either with iron or catalytically with hydrogen. Crude 3-aminobenzenesulfonic acid can be used directly, either as a solution or dried, to obtain 3-aminophenol by alkali fusion. It is not sufficiently pure for use in dye manufacture, however. Therefore the crude solution is acidified; after filtration the product thus obtained is of satisfactory purity.
General Description
White powder. Small colorless needles; toxic.
Air & Water Reactions
Water insoluble [Hawley].
Reactivity Profile
Metanilic acid is an amino acid. Reacts weakly with both acids and bases.
Hazard
See aniline.
Fire Hazard
Flash point data for Metanilic acid are not available, however Metanilic acid is probably combustible.
Flammability and Explosibility
Non flammable
Purification Methods
Crystallise the acid from water (as the hydrate), under CO2 in a semi-darkened room. The solution is photosensitive. Dry it over 90% H2SO4 in a vacuum desiccator. [Beilstein 14 H 688, 14 IV 2640.]
Metanilic acid Preparation Products And Raw materials
Raw materials
1of3
Preparation Products
1of6
| Supplier | Tel | Country | ProdList | Advantage | |
|---|---|---|---|---|---|
| J & K SCIENTIFIC LTD. | 18210857532 18210857532 | jkinfo@jkchemical.com | China | 96815 | 76 |
| Meryer (Shanghai) Chemical Technology Co., Ltd. | 4006356688 18621169109 | market03@meryer.com | China | 40202 | 62 |
| Alfa Aesar | 400-6106006 | saleschina@alfa-asia.com | China | 30103 | 84 |
| TCI (Shanghai) Development Co., Ltd. | 021-67121386 | Sales-CN@TCIchemicals.com | China | 24512 | 81 |
| Beijing dtftchem Technology Co., Ltd. | 010-60275820 13031183356 | elainezt@sina.com | China | 1386 | 62 |
| Energy Chemical | 400-0056266 | sales8178@energy-chemical.com | China | 44850 | 61 |
| Capot Chemical Co., Ltd | +86 (0) 571 85 58 67 18 | China | 18187 | 66 | |
| Beijing Ouhe Technology Co., Ltd | 13552068683 13522913783 | 2355560935@qq.com | China | 11777 | 60 |
| Nanjing Chemlin Chemical Co., Ltd | 025-83697070 13770331960 | info@chemlin.com.cn | China | 16305 | 64 |
| Shanghai Hanhong Scientific Co.,Ltd. | 021-54306202 13764082696 | info@hanhongsci.com | China | 42917 | 64 |
View Latest Price from Metanilic acid manufacturers
| Image | Update time | Product | Price | Min. Order | Purity | Supply Ability | Manufacturer | |
|---|---|---|---|---|---|---|---|---|
 |
2026-09-18 | Metanilic acid
121-47-1
|
$75.00-100.00 | 1kg | 99% | 5000 | HEBEI SHENGSUAN CHEMICAL INDUSTRY CO.,LTD | |
 |
2026-09-18 | Metanilic acid
121-47-1
|
1KG | 98%min | 30tons/month | WUHAN FORTUNA CHEMICAL CO., LTD | ||
 |
2026-09-18 | Metanilic acid
121-47-1
|
1KG | 99% | 1000mt | Jinan Finer Chemical Co., Ltd |
-
- Metanilic acid
121-47-1
- $75.00-100.00
- 99%
- HEBEI SHENGSUAN CHEMICAL INDUSTRY CO.,LTD
-
- Metanilic acid
121-47-1
- $0.00
- 98%min
- WUHAN FORTUNA CHEMICAL CO., LTD
-
- Metanilic acid
121-47-1
- $0.00
- 99%
- Jinan Finer Chemical Co., Ltd
