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8.21027

Sigma-Aldrich

Phthaldialdehyde

for synthesis

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Synonym(s):
Phthaldialdehyde, OPA
Linear Formula:
C6H4-1,2-(CHO)2
CAS Number:
643-79-8
Molecular Weight:
134.13
MDL number:
MFCD00003335
UNSPSC Code:
12352114
EC Index Number:
211-402-2
NACRES:
NA.22

Quality Level

200

Assay

≥97.5% (GC)

form

solid

autoignition temp.

480 °C

potency

178 mg/kg LD50, oral (Rat)
>2000 mg/kg LD50, skin (Rat)

pH

7 (20 °C, 53 g/L in H2O)

bp

83-84 °C/1 hPa

mp

52-58 °C

transition temp

flash point 132 °C

solubility

53 g/L

density

1.13 g/cm3 at 20 °C

bulk density

530 kg/m3

storage temp.

2-30°C

InChI

1S/C8H6O2/c9-5-7-3-1-2-4-8(7)6-10/h1-6H

InChI key

ZWLUXSQADUDCSB-UHFFFAOYSA-N

Application


  • An investigation of o-phthaldialdehyde as a derivatization reagent and optimization of instrumental parameters for qualitative amino acid profiling via UPLC-UV Detailed examination of o-phthaldialdehyde′s efficiency in amino acid profiling to enhance diagnostic accuracies for metabolic diseases like AKU and PKU (A Aspö - 2023). Access the study.

  • Correlation of the Free Amino Nitrogen and Nitrogen by O-Phthaldialdehyde Methods in the Assay of Beer This research correlates nitrogen content measurements in beer using the o-phthaldialdehyde method, discussing its implications for brewing quality control (L Otama, S Tikanoja, H Kane, S Hartikainen, L Kaski - Date not specified). Access the study.

  • Turn-on fluorescence detection of glutathione based on o-phthaldialdehyde-assisted SiO2 particles Investigation into a novel fluorometric method for detecting glutathione in supplements using o-phthaldialdehyde and functionalized silica particles (P Nedeljko, M Turel, A Lobnik - 2018). Access the study.

  • Biochemical Measures of Neuropathy-Glutathione Assay (GSH) A study on the biochemical assessment of neuropathy by measuring glutathione levels using o-phthaldialdehyde in a methanol solution, emphasizing the methodology′s sensitivity and reliability (E Feldman - 2019). Access the study.

Analysis Note

Assay (GC, area%): ≥ 97.5 % (a/a)
Melting range (lower value): ≥ 52 °C
Melting range (upper value): ≤ 56 °C
Identity (IR): passes test

Signal Word

Danger

Hazard Classifications

Acute Tox. 3 Oral - Aquatic Acute 1 - Aquatic Chronic 1 - Eye Dam. 1 - Skin Corr. 1B - Skin Sens. 1 - STOT SE 3

Target Organs

Respiratory system

Storage Class Code

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

WGK

WGK 3

Flash Point(F)

269.6 °F - closed cup

Flash Point(C)

132 °C - closed cup

Certificates of Analysis (COA)

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