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Aliphatic and alicyclic building blocks

9-cis-Retinal

Also known as 9-cis-Retinaldehyde, Isoretinene A, 9-cis-Vitamin A aldehyde

CAS 514-85-2Formula C20H28OMolar mass 284.44 g/molEC 208-188-8
GHS signal word: Warning. Pictograms: Harmful or irritant
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9-cis-Retinal chemical structure, C20H28O, CAS 514-85-2
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
514-85-2
Formula
C20H28O
Molar mass
284.44 g/mol
EC number
208-188-8
HS code
291229
Category
Aliphatic and alicyclic building blocks

What is 9-cis-Retinal?

Plain description, key identifiers and synonyms

9-cis-retinal is a retinal in which the double bond at position 9 has cis configuration, whilst the remaining acyclic double bonds have trans configuration.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
(2E,4E,6Z,8E)-3,7-dimethyl-9-(2,6,6-trimethylcyclohexen-1-yl)nona-2,4,6,8-tetraenal
CAS number
514-85-2 CAS number cross-checked
EC number
208-188-8
Molecular formula
C20H28O
MDL number
MFCD00135842
InChIKey
NCYCYZXNIZJOKI-MKOSUFFBSA-N
InChI
InChI=1S/C20H28O/c1-16(8-6-9-17(2)13-15-21)11-12-19-18(3)10-7-14-20(19,4)5/h6,8-9,11-13,15H,7,10,14H2,1-5H3/b9-6+,12-11+,16-8-,17-13+
Canonical SMILES
CC(C=CC=C(C)C=CC1=C(C)CCCC1(C)C)=CC=O
Isomeric SMILES
CC1=C(C(CCC1)(C)C)/C=C/C(=C\C=C\C(=C\C=O)\C)/C

Synonyms

  • 9-cis-Retinaldehyde
  • Isoretinene A
  • 9-cis-Vitamin A aldehyde
  • 9-C-Retinal
  • Retinal, 9-cis-
  • 9-cis-3,7-Dimethyl-9-(2,6,6-trimethyl-1-cyclohexen-1-yl)-2,4,6,8-nonatetraenal
  • (2E,4E,6Z,8E)-3,7-dimethyl-9-(2,6,6-trimethylcyclohexen-1-yl)nona-2,4,6,8-tetraenal
  • (2E,4E,6Z,8E)-3,7-dimethyl-9-(2,6,6-trimethyl-1-cyclohexenyl)nona-2,4,6,8-tetraenal
  • 3,7-dimethyl-9-(2,6,6-trimethylcyclohexen-1-yl)nona-2,4,6,8-tetraenal
  • (2E,4E,6Z,8E)-3,7-dimethyl-9-(2,6,6-trimethylcyclohex-1-en-1-yl)nona-2,4,6,8-tetraenal
  • (9cis)-retinal
  • Iso Rhodopsin
  • 9-cis-7,11,13-trans-retinal
  • cis-9-Retinal
  • Retinal #
  • 4-07-00-01254 (Beilstein Handbook Reference)

Physical and chemical properties

Measured values and descriptors computed from the structure

Physical and chemical properties

Measured values, check the supplier specification for your grade

No measured properties are recorded for this substance yet. Ask suppliers for a technical data sheet.

Values vary by grade. Ask suppliers for the COA or TDS of the batch you buy.

Computed descriptors

Calculated from the structure, useful for screening and formulation

Molecular weight
284.44 g/molcalc.
Exact mass
284.214 Dacalc.
LogP (octanol/water)
5.72calc.
Topological polar surface area
17.07 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
1calc.
Rotatable bonds
5calc.
Heavy atoms
21calc.
Rings
1calc.
Aromatic rings
0calc.
Fraction sp3 carbons
0.45calc.
Formal charge
0calc.
Stereocentres
0calc.
Lipinski rule of five
Passes (1 violation)calc.

Calculated for screening. Confirm critical figures with the supplier.

Murcko scaffold

The ring system that remains when every side chain is removed

Murcko scaffold of this chemical, C1=CCCCC1

C1=CCCCC1

1 ring, 6 atoms, the Cyclohexene ring system.

5,167 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Warning
GHS07: Harmful or irritant
Harmful or irritant

Hazard statements

  • H302Harmful if swallowed.
  • H312Harmful in contact with skin.
  • H315Causes skin irritation.
  • H332Harmful if inhaled.
Precautionary statements (14)
  • P261Avoid breathing dust, fume, gas, mist, vapours or spray.
  • P264Wash skin thoroughly after handling.
  • P270Do not eat, drink or smoke when using this product.
  • P271Use only outdoors or in a well-ventilated area.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P301 + P317If swallowed: Get medical help.
  • P302 + P352If on skin: Wash with plenty of water.
  • P304 + P340If inhaled: Remove person to fresh air and keep comfortable for breathing.
  • P317Get medical help.
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • P330Rinse mouth.
  • P332 + P317If skin irritation occurs: Get medical help.
  • P362 + P364Take off contaminated clothing. And wash it before reuse.
  • P501Dispose of contents and container in accordance with local regulations.

GHS classification summary, not a safety data sheet (SDS). Classifications can differ by supplier, grade and concentration. Always check the supplier's SDS.

Full safety data and first aid

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9-cis-Retinal price

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Uses and applications

What the substance is used for, by industry and function

Regulatory status

Inventories, regulations and trade controls that list this substance

United States

  • TSCA inventory (USA)
    Status: Inactive in US commerce

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code 9-cis-Retinal is traded under.

HS 2912.29Indicative HS code

Cyclic aldehydes without other oxygen function, other

World exports in 2024
$435M
+19.0% vs 2023, imports $484M
2019 to 2024
Top exporters
  1. China19.5%
  2. Japan17.4%
  3. India * partner reported13.0%
Top importers
  1. United States22.5%
  2. China9.2%
  3. Singapore8.4%

* Partner reported figures, a lower bound.

Reported customs values in USD, not prices.Full trade data

The HS code shown for 9-cis-Retinal is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about 9-cis-Retinal, based on the data on this page

What is 9-cis-Retinal?

9-cis-retinal is a retinal in which the double bond at position 9 has cis configuration, whilst the remaining acyclic double bonds have trans configuration.

What is the CAS number of 9-cis-Retinal?

The CAS registry number of 9-cis-Retinal is 514-85-2.

What is the molecular formula and weight of 9-cis-Retinal?

The molecular formula of 9-cis-Retinal is C20H28O and its molar mass is 284.44 g/mol.

What is 9-cis-Retinal used for?

Known uses and roles of 9-cis-Retinal include building blocks in research and laboratory and screening compounds in research and laboratory.

Is 9-cis-Retinal hazardous?

9-cis-Retinal carries the GHS signal word "Warning". Main hazards: harmful if swallowed, harmful in contact with skin, causes skin irritation. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of 9-cis-Retinal?

9-cis-Retinal is usually classified under HS code 291229 (Cyclic aldehydes without other oxygen function, other). This is indicative, confirm it with your customs broker before shipping.

Where can I buy 9-cis-Retinal?

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What is the price of 9-cis-Retinal?

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Guides for buyers

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Data last updated 7 Oct 2026. Details may have changed, please confirm them with the supplier. Report an error on this page
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