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ChemicalBook >> CAS DataBase List >> o-Phthalaldehyde

o-Phthalaldehyde

o-Phthalaldehyde price.
  • $7.62 - $4311.73
  • Product name: o-Phthalaldehyde
  • CAS: 643-79-8
  • MF: C8H6O2
  • MW: 134.13
  • EINECS:211-402-2
  • MDL Number:MFCD00003335
  • Synonyms:The developMent of forMaldehyde;O-PHTHALDIALDEHYDE REAGENT SOLUTION*;TIMTEC-BB SBB008450;2-PHTHALALDEHYDE;2-PHTHALDEHYDE;2-PHTHALDIALDEHYDE;o-Phenyldialdehyde;1,2-Phthalic dicarboxaldehyde, 98+%
104 prices
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  • aablocks
  • Activate Scientific
  • Adipogen Life Sciences
  • AHH
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  • Chem-Impex
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  • Manufactureraablocks
  • Product numberAA0035EP
  • Product description1,2-Benzenedicarboxaldehyde 98%
  • Packaging10g
  • Price$8
  • Updated2026-05-21
  • Buy
  • Manufactureraablocks
  • Product numberAA0035EP
  • Product description1,2-Benzenedicarboxaldehyde 98%
  • Packaging10g
  • Price$8
  • Updated2026-05-28
  • Buy
  • Manufactureraablocks
  • Product numberAA0035EP
  • Product description1,2-Benzenedicarboxaldehyde 98%
  • Packaging25g
  • Price$10
  • Updated2026-05-21
  • Buy
  • Manufactureraablocks
  • Product numberAA0035EP
  • Product description1,2-Benzenedicarboxaldehyde 98%
  • Packaging25g
  • Price$10
  • Updated2026-05-28
  • Buy
  • Manufactureraablocks
  • Product numberAA0035EP
  • Product description1,2-Benzenedicarboxaldehyde 98%
  • Packaging100g
  • Price$31
  • Updated2026-05-21
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  • Manufactureraablocks
  • Product numberAA0035EP
  • Product description1,2-Benzenedicarboxaldehyde 98%
  • Packaging100g
  • Price$31
  • Updated2026-05-28
  • Buy
  • ManufacturerActivate Scientific
  • Product numberAS20560
  • Product descriptiono-Phthaldialdehyde 95%
  • Packaging5g
  • Price$27
  • Updated2026-06-04
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  • ManufacturerActivate Scientific
  • Product numberAS20560
  • Product descriptiono-Phthaldialdehyde 95%
  • Packaging25g
  • Price$67
  • Updated2026-06-04
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  • ManufacturerAdipogen Life Sciences
  • Product numberCDX-O0008-G005
  • Product descriptiono-Phthaldialdehyde ≥99%(HPLC)
  • Packaging5g
  • Price$105
  • Updated2026-05-06
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  • ManufacturerAdipogen Life Sciences
  • Product numberCDX-O0008-G001
  • Product descriptiono-Phthaldialdehyde ≥99%(HPLC)
  • Packaging1g
  • Price$35
  • Updated2021-12-16
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  • ManufacturerAdipogen Life Sciences
  • Product numberCDX-O0008-G001
  • Product descriptiono-Phthaldialdehyde ≥99%(HPLC)
  • Packaging1g
  • Price$40
  • Updated2026-05-06
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  • ManufacturerAdipogen Life Sciences
  • Product numberCDX-O0008-G025
  • Product descriptiono-Phthaldialdehyde ≥99%(HPLC)
  • Packaging25g
  • Price$421
  • Updated2026-05-06
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  • ManufacturerAHH
  • Product numberMT-21427
  • Product description2-Phthalaldehyde 99%
  • Packaging1000g
  • Price$588
  • Updated2021-12-16
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  • ManufacturerAHH
  • Product numberMT-21427
  • Product description2-Phthalaldehyde 97%
  • Packaging1000g
  • Price$588
  • Updated2026-05-25
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  • ManufacturerAHH
  • Product numberMT-21427
  • Product description2-Phthalaldehyde 97%
  • Packaging1000g
  • Price$588
  • Updated2026-05-26
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  • ManufacturerAK Scientific
  • Product numberJ90223
  • Product descriptiono-Phthalaldehyde 97%
  • Packaging100g
  • Price$839
  • Updated2026-06-04
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Manufacturer Product number Product description Packaging Price Updated Buy
aablocks AA0035EP 1,2-Benzenedicarboxaldehyde 98% 10g $8 2026-05-21 Buy
aablocks AA0035EP 1,2-Benzenedicarboxaldehyde 98% 10g $8 2026-05-28 Buy
aablocks AA0035EP 1,2-Benzenedicarboxaldehyde 98% 25g $10 2026-05-21 Buy
aablocks AA0035EP 1,2-Benzenedicarboxaldehyde 98% 25g $10 2026-05-28 Buy
aablocks AA0035EP 1,2-Benzenedicarboxaldehyde 98% 100g $31 2026-05-21 Buy
aablocks AA0035EP 1,2-Benzenedicarboxaldehyde 98% 100g $31 2026-05-28 Buy
Activate Scientific AS20560 o-Phthaldialdehyde 95% 5g $27 2026-06-04 Buy
Activate Scientific AS20560 o-Phthaldialdehyde 95% 25g $67 2026-06-04 Buy
Adipogen Life Sciences CDX-O0008-G005 o-Phthaldialdehyde ≥99%(HPLC) 5g $105 2026-05-06 Buy
Adipogen Life Sciences CDX-O0008-G001 o-Phthaldialdehyde ≥99%(HPLC) 1g $35 2021-12-16 Buy
Adipogen Life Sciences CDX-O0008-G001 o-Phthaldialdehyde ≥99%(HPLC) 1g $40 2026-05-06 Buy
Adipogen Life Sciences CDX-O0008-G025 o-Phthaldialdehyde ≥99%(HPLC) 25g $421 2026-05-06 Buy
AHH MT-21427 2-Phthalaldehyde 99% 1000g $588 2021-12-16 Buy
AHH MT-21427 2-Phthalaldehyde 97% 1000g $588 2026-05-25 Buy
AHH MT-21427 2-Phthalaldehyde 97% 1000g $588 2026-05-26 Buy
AK Scientific J90223 o-Phthalaldehyde 97% 100g $839 2026-06-04 Buy

Properties

Melting point :55-58 °C(lit.)
Boiling point :83-84 °C (0.7501 mmHg)
Density :1.13
bulk density :530kg/m3
vapor pressure :0.56Pa at 25℃
refractive index :1.4500 (estimate)
Flash point :>230 °F
storage temp. :2-8°C
solubility :The solubility of o-phthalaldehyde is 3g/100 mL diisopropyl ether, 5g/100mL deionized water, 20g/100mL chloroform, or 20g/100mL acetone at 20°C.
form :powder
color :yellow
PH :7 (53g/l, H2O, 20℃)
Water Solubility :soluble
Sensitive :Air Sensitive
Merck :14,7368
BRN :878317
Exposure limits :ACGIH: SL .025 mg/100 cm2; Ceiling 0.1 ppb (Skin)
Stability :Stable. Air sensitive. Incompatible with strong oxidizing agents, strong bases.
InChI :1S/C8H6O2/c9-5-7-3-1-2-4-8(7)6-10/h1-6H
InChIKey :ZWLUXSQADUDCSB-UHFFFAOYSA-N
SMILES :O=Cc1ccccc1C=O
LogP :0.99 at 30℃
CAS DataBase Reference :643-79-8(CAS DataBase Reference)
NIST Chemistry Reference :O-phthalaldehyde(643-79-8)
EPA Substance Registry System :1,2-Benzenedicarboxaldehyde (643-79-8)

Safety Information

Symbol(GHS): Corrosion (GHS05)Skull and Crossbones (GHS06)Environment (GHS09)
Signal word: Danger
Hazard statements:
Code Hazard statements Hazard class Category Signal word Pictogram P-Codes
H301 Toxic if swalloed Acute toxicity,oral Category 3 Danger P264, P270, P301+P310, P321, P330,P405, P501
H314 Causes severe skin burns and eye damage Skin corrosion/irritation Category 1A, B, C Danger P260,P264, P280, P301+P330+ P331,P303+P361+P353, P363, P304+P340,P310, P321, P305+ P351+P338, P405,P501
H317 May cause an allergic skin reaction Sensitisation, Skin Category 1 Warning P261, P272, P280, P302+P352,P333+P313, P321, P363, P501
H335 May cause respiratory irritation Specific target organ toxicity, single exposure;Respiratory tract irritation Category 3 Warning
H410 Very toxic to aquatic life with long lasting effects Hazardous to the aquatic environment, long-term hazard Category 1 Warning P273, P391, P501
Precautionary statements:
P260 Do not breathe dust/fume/gas/mist/vapours/spray.
P273 Avoid release to the environment.
P280 Wear protective gloves/protective clothing/eye protection/face protection.
P303+P361+P353 IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower.
P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

Description

Phthaldialdehyde is used as a fluorescent reagent for checking the assay of amines present in proteins, peptides by capillary electrophoresis and chromatography. It is also used for cholesterol assay in the picomole range as well as for fluorometric determination of histamine, histidine and other amino acids. Poly(phthalaldehyde) is obtained by the polymerization reaction which is used to make a photoresist. The nitrogen by o-phthaldialdehyde assay (NOPA) is a method used in winemaking process to measure the completion of fermentation.

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