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185426

Sigma-Aldrich

o-Toluidine

≥99%

Synonym(s):

2-Aminotoluene, 2-Methylaniline

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$67.20
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5 G
$46.00
100 G
$67.20
500 G
$157.00

About This Item

Linear Formula:
CH3C6H4NH2
CAS Number:
95-53-4
Molecular Weight:
107.15
Beilstein/REAXYS Number:
741981
EC Number:
202-429-0
MDL number:
MFCD00007730
UNSPSC Code:
12352100
PubChem Substance ID:
24851137
NACRES:
NA.22

$46.00

Available to ship onApril 30, 2025Details

Request a Bulk Order

vapor density

3.7 (vs air)

Quality Level

100

vapor pressure

0.26 mmHg ( 25 °C)

assay

≥99%

form

liquid

autoignition temp.

899 °F

refractive index

n20/D 1.572 (lit.)

bp

199-200 °C (lit.)
89-90 °C/11 mmHg (lit.)

mp

−28 °C (lit.)

solubility

alcohol: soluble
diethyl ether: soluble
water: slightly soluble

density

1.008 g/mL at 25 °C (lit.)

SMILES string

Cc1ccccc1N

InChI

1S/C7H9N/c1-6-4-2-3-5-7(6)8/h2-5H,8H2,1H3

InChI key

RNVCVTLRINQCPJ-UHFFFAOYSA-N

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General description

o-Toluidine undergoes chemically oxidative polymerization with aniline in the presence of ammonium persulfate as an oxidant in HCl medium[1].

Application

o-Toluidine was used in determination of glucose in biological materials[2]. It was used as precursor in the synthesis of poly(o-toluidine) and copper nanoparticle composite material[3].

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Danger

Hazard Classifications

Acute Tox. 3 Inhalation - Acute Tox. 3 Oral - Aquatic Acute 1 - Aquatic Chronic 2 - Carc. 1B - Eye Irrit. 2

Storage Class

6.1A - Combustible acute toxic Cat. 1 and 2 / very toxic hazardous materials

wgk_germany

WGK 3

flash_point_f

185.0 °F - closed cup

flash_point_c

85 °C - closed cup

ppe

Eyeshields, Faceshields, Gloves, type ABEK (EN14387) respirator filter

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Certificates of Analysis (COA)

Lot/Batch Number
MKCV5690
MKCS9515
MKCR6388
MKCQ1660
MKCP7804

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A T Smit et al.
Bioresource technology, 243, 994-999 (2017-07-30)
Enzymatic cellulose hydrolysis of pretreated wheat straw pulp to glucose is enhanced when the hydrolysis is performed in the presence of an aqueous extract of the wheat straw. A relative digestibility increase of about 10% has been observed for organosolv
In situ synthesis of copper nanoparticles and poly (< i> o</i>-toluidine): A metal-polymer composite material.
Mallick K, et al.
Eur. Polymer J., 42(3), 670-675 (2006)
Oxidative copolymers of aniline with o-toluidine: Their structure and thermal properties.
Huang M-R, et al.
Journal of Applied Polymer Science, 81(8), 1838-1847 (2001)
Ivo Kalkman et al.
Physical chemistry chemical physics : PCCP, 11(21), 4311-4318 (2009-05-22)
The rotationally resolved spectrum of the o-toluidine S(1)<-- S(0) origin was measured using laser induced fluorescence spectroscopy. From the resulting spectrum torsional barriers to internal rotation of the methyl group were derived, which resulted in S(0) state values of V(3)
Emna Hmani et al.
Journal of hazardous materials, 170(2-3), 928-933 (2009-06-23)
Electrochemical oxidation of O-toluidine (OT) was studied by galvanostatic electrolysis using lead dioxide (PbO2) and boron-doped diamond (BDD) as anodes. The influence of operating parameters, such as current density, initial concentration of OT and temperature was investigated. Measurements of chemical
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Questions

1–4 of 4 Questions  

  1. How can I determine the shelf life / expiration / retest date of this product?

    1 answer

    1. If this product has an expiration or retest date, it will be shown on the Certificate of Analysis (COA, CofA). If there is no retest or expiration date listed on the product's COA, we do not have suitable stability data to determine a shelf life. For these products, the only date on the COA will be the release date; a retest, expiration, or use-by-date will not be displayed.
      For all products, we recommend handling per defined conditions as printed in our product literature and website product descriptions. We recommend that products should be routinely inspected by customers to ensure they perform as expected.
      For products without retest or expiration dates, our standard warranty of 1 year from the date of shipment is applicable.
      For more information, please refer to the Product Dating Information document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/449/386/product-dating-information-mk.pdf

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  2. How is shipping temperature determined? And how is it related to the product storage temperature?

    1 answer

    1. Products may be shipped at a different temperature than the recommended long-term storage temperature. If the product quality is sensitive to short-term exposure to conditions other than the recommended long-term storage, it will be shipped on wet or dry-ice. If the product quality is NOT affected by short-term exposure to conditions other than the recommended long-term storage, it will be shipped at ambient temperature. As shipping routes are configured for minimum transit times, shipping at ambient temperature helps control shipping costs for our customers. For more information, please refer to the Storage and Transport Conditions document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/316/622/storage-transport-conditions-mk.pdf

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  3. is Ortho toluidine could used as cholorine indicator in water

    1 answer

    1. This product has not been tested for use in detecting chlorine in water samples. Suitability would have to be determined by the end user, however, there is no reason to suspect that this product would not be acceptable.

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  4. hi. Is o-toluidine the same that stain toluidine blue? cheers Jose

    1 answer

    1. o-Toluidine and Toluidine Blue are not the same chemically. o-Toluidine has a linear formula of CH3C6H4NH2 and a molecular weight of 107.15 g/mol. Toluidine Blue has a linear formula of C15H16ClN3S · 0.5ZnCl2 with a molecular weight of 373.97 g/mol.

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