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API Process Intermediates & Related Compounds

5-Nitro-o-toluenesulfonic Acid

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Order 5-Nitro-o-toluenesulfonic Acid (CAS 121-03-9) online at Zemixal. Lab and bulk packs, batch COA, fast global delivery.

Pack sizes
5-Nitro-o-toluenesulfonic Acid chemical structure
CAS number121-03-9
FormulaC7H7NO5S
Molar mass217.2 g/mol
Physical formSolid
InChIKeyZDTXQHVBLWYPHS-UHFFFAOYSA-N
IUPAC name2-methyl-5-nitrobenzenesulfonic acid

About 5-Nitro-o-toluenesulfonic Acid

Researchers and plant chemists source 5-Nitro-o-toluenesulfonic Acid from Zemixal for routine and specialised work. For your records, the material is defined by CAS 121-03-9, formula C7H7NO5S and molar mass 217.2 g/mol. It is handled as a solid.

Typical applications

  • API route development
  • Impurity fate & purge studies
  • Analytical method development
  • Fine chemical synthesis

Safe handling

It carries the GHS signal word Danger (H302, H314, H315 and H317), so wear gloves and eye protection and work with good ventilation.

Standard pack sizes are 10 mg, 25 mg, 50 mg and 100 mg, and custom quantities are quoted on request. You receive a batch certificate of analysis and a 16-section SDS with each order. Add it to your quote list and our team replies with price, lead time and shipping options within one business day.

Reference standards for Fludarabine

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Typical uses

  • API route development
  • Impurity fate & purge studies
  • Analytical method development
  • Fine chemical synthesis

Applications

Pharmaceutical Manufacturing and QCResearch Labs and Universities

Specifications and identifiers

Specifications of 5-Nitro-o-toluenesulfonic Acid
Product name5-Nitro-o-toluenesulfonic Acid
Catalogue numberZX-043621
CAS number121-03-9
IUPAC name2-methyl-5-nitrobenzenesulfonic acid
Molecular formulaC7H7NO5S
Molar mass217.2 g/mol
Exact mass217.0045
Physical formSolid
XLogP30.9
H-bond donors / acceptors1 / 5
Topological polar surface area109 Ų
InChIKeyZDTXQHVBLWYPHS-UHFFFAOYSA-N
SMILESCC1=C(C=C(C=C1)[N+](=O)[O-])S(=O)(=O)O
PubChem CID8458
Synonymsp-Nitrotoluene-o-sulfonic acid, 4-Nitrotoluene-2-sulfonic acid, 4-Nitro-2-toluenesulfonic acid, Benzenesulfonic acid, 2-methyl-5-nitro-, 5-Nitro-2-methylbenzenesulfonic acid, o-Toluenesulfonic acid, 5-nitro-, Kyselina 4-nitrotoluen-2-sulfonova, 2-Toluenesulfonic acid, 5-nitro, 4-Nitrotoluene-2-sulphonic acid, 2-methyl-5-nitrobenzene-1-sulfonic acid, 4-Nitrotoluene-2-sulfonic Acid Hydrate, p-nitrotoluol-o-sulfonic acid

Lot values are stated on the batch certificate of analysis. Ask for a typical COA with your quotation.

Safety and GHS hazards

GHS05 Corrosive
Corrosive
GHS07 Irritant or harmful
Irritant or harmful

Signal word Danger

  • H302Harmful if swallowed
  • H314Causes severe skin burns and eye damage
  • H315Causes skin irritation
  • H317May cause an allergic skin reaction
  • H318Causes serious eye damage

Precautionary statements P260, P261, P264, P264 + P265, P270, P272, P280, P301 + P317, P301 + P330 + P331, P302 + P352, P302 + P361 + P354, P304 + P340, P305 + P354 + P338, P316, P317, P321, P330, P332 + P317, P333 + P317, P362 + P364, P363, P405, P501

Classification summarised from public GHS notifications. It can vary with grade and concentration, so always follow the SDS supplied with your lot.

Pack sizes

Pack sizes of 5-Nitro-o-toluenesulfonic Acid
10 mgQuoted on request
25 mgQuoted on request
50 mgQuoted on request
100 mgQuoted on request

Need a different size? Bulk drums and custom packing are quoted on request through the quote form on this page.

Questions about 5-Nitro-o-toluenesulfonic Acid

Which CAS number identifies 5-Nitro-o-toluenesulfonic Acid?
5-Nitro-o-toluenesulfonic Acid is registered under CAS 121-03-9. You may also see it listed as p-Nitrotoluene-o-sulfonic acid, 4-Nitrotoluene-2-sulfonic acid, 4-Nitro-2-toluenesulfonic acid. Our catalogue number for this item is ZX-043621.
What are the formula and molar mass of 5-Nitro-o-toluenesulfonic Acid?
For 5-Nitro-o-toluenesulfonic Acid, its formula is C7H7NO5S and its molar mass is 217.2 g/mol. The systematic (IUPAC) name is 2-methyl-5-nitrobenzenesulfonic acid. InChIKey ZDTXQHVBLWYPHS-UHFFFAOYSA-N lets you match it in any structure database.
How is 5-Nitro-o-toluenesulfonic Acid used in pharmaceutical QC?
5-Nitro-o-toluenesulfonic Acid is a characterised reference material linked to Fludarabine. Laboratories use it to identify and quantify this impurity during method development and validation, stability work, batch release testing and regulatory submissions.
What grade and pack sizes are available for 5-Nitro-o-toluenesulfonic Acid?
The grade and assay are confirmed on the quotation and the batch COA. Standard packs are 10 mg, 25 mg, 50 mg, 100 mg. Larger quantities and custom packing can be quoted on request.
Which documents come with 5-Nitro-o-toluenesulfonic Acid?
Each lot ships with a batch certificate of analysis and a 16-section GHS safety data sheet. A typical COA or specification sheet can be shared with the quotation before you order.
Can Zemixal ship 5-Nitro-o-toluenesulfonic Acid to my country?
Yes. Because 5-Nitro-o-toluenesulfonic Acid is classed as hazardous, it travels in UN-approved packaging as dangerous goods under IATA or IMDG rules, with the export paperwork your broker needs.

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