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all-trans-retinal

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Origin: China

Cas No: 116-31-4

Specification: 99%min

Min order Quantity: 1 /kg

Supply Ability: 100 mt/month

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Products Specification
Product Description

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CAS No.: 116-31-4 Formula: C20H28O Molecular Weight: 284.43600

Description

Retinal is also known as retinaldehyde. It was originally called retinene, and renamed afterwards it was discovered to be vitamin A aldehyde. Retinal is one of the many forms of vitamin A (the number of which varies from species to species). Retinal is a polyene chromophore, bound to proteins called opsins, and is the chemical basis of animal vision. Retinal allows certain microorganisms to convert light into metabolic energy.
Vertebrate animals ingest retinal directly from meat, or they produce retinal from carotenoids, either from one of two carotenes (α-carotene, β-carotene) or from β-cryptoxanthin, a type of xanthophyll. These carotenoids must be obtained from plants or other photosynthetic organisms. No other carotenoids can be converted by animals to retinal, and some carnivores cannot convert any carotenoids at all. The other main forms of vitamin A, retinol, and a partially active form, retinoic acid, may both be produced from retinal.
Invertebrates such as insects and squid use hydroxylated forms of retinal in their visual systems, which derive from conversion from other xanthophylls.

Basic Info

Chemical Name	all-trans-retinal
Synonyms	all trans-Retinal; all-trans-Retinal; Retinal (all trans);
CAS No.	116-31-4
Molecular Formula	C20H28O
Molecular Weight	284.43600
PSA	17.07000
LogP	5.71690

Properties

Appearance & Physical State	Yellow powder
Density	0.948g/cm3
Boiling Point	421.4ºC at 760mmHg
Melting Point	61-63ºC
Flash Point	205.4ºC
Refractive Index	1.54
Storage Condition	-20ºC
Vapor Pressure	2.61E-07mmHg at 25°C

Safety Info

RTECS	VH6407000
Safety Statements	22-36/37
HS Code	2912299000
WGK Germany	3
Risk Statements	R22; R38
Hazard Codes	Xn
Symbol	GHS07
Signal Word	Warning
Hazard Declaration	H302; H315

Synthesis Route

all-trans-retinal propylene dithioacetal→13-cis-retinal+all-trans-retinal
all-trans-Retinol→13-cis-retinal+all-trans-retinal
all-trans-retinal→13-cis-retinal+all-trans-retinal

GC Analysis

Column type	Active phase	Temperature (°C)	Retention Index (I)	Temperature Control Method
Capillary	DB-1	240.	2466.	isothermal
Capillary	DB-1	240.	2466.	isothermal

Precursor

(2E)-3-bromobut-2-enal
2,2-dimethylpent-4-enal
((1E,3E,5E)-4-methyl-6-(2,6,6-trimethylcyclohex-1-en-1-yl)hexa-1,3,5-trien-1-yl)boronic acid
all-trans-Retinol

Downstream Product

4-Keto Retinal
4-oxo-13-cis-retinal
4-hydroxy-13-cis-retinal
diketoretinal

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