Shanghai Nianxing Industrial Co., Ltd
China
Product Name: 1,2,3,4-Tetrahydroisoquinoline
Price: Check
Purity: 95.0%
Stocking Period: 10 Day
Contact: Yang
Email: sales@echemcloud.com

Shanghai Jizhi Biochemical Technology Co., Ltd
China
Product Name: 1,2,3,4-Tetrahydroisoquinoline
Price: ￥308.0/100g ￥108.0/25g
Purity: 98.0%
Stocking Period: Inquiry
Contact: Liu jia
Email: 2130147988@qq.com

Dayang Chem (Hangzhou) Co., Ltd.
China
Product Name: 1,2,3,4-Tetrahydroisoquinoline
Price: $Inquiry/100g $Inquiry/1kg $Inquiry/100kg $Inquiry/1000kg
Purity: 98.0%
Stocking Period: Inquiry
Contact: Ms Wang
Email: enquiry@dycnchem.com

Henan Tianfu Chemical Co., Ltd.
China
Product Name: 1,2,3,4-Tetrahydroisoquinoline 91-21-4
Price: $Inquiry/1kg $Inquiry/25kg $Inquiry/1000kg $Inquiry/10ton
Purity: 99.0%
Stocking Period: Inquiry
Contact: Anson
Email: info@tianfuchem.com

91-21-4

91-21-4 structure

91-21-4 structure

Name: 1,2,3,4-Tetrahydroisoquinoline
Chemical Name: 1,2,3,4-Tetrahydroisoquinoline
CAS Number: 91-21-4
Molecular Formula: C₉H₁₁N
Molecular Weight: 133.190
Catalog: Pharmaceutical intermediate Heterocyclic compound Isoquinoline compound
Create Date: 2018-08-28 12:23:08
Modify Date: 2025-08-21 18:34:35

Name	1,2,3,4-Tetrahydroisoquinoline
Synonyms	Isoquinoline, 1,2,3,4-tetrahydro- tetrahydroisoquinoline 1,2,3,4-Tetrahydroisoquinoline EINECS 202-050-0 MFCD00006896

Density	1.0±0.1 g/cm3
Boiling Point	232.5±9.0 °C at 760 mmHg
Melting Point	−30 °C(lit.)
Molecular Formula	C₉H₁₁N
Molecular Weight	133.190
Flash Point	98.9±0.0 °C
Exact Mass	133.089142
PSA	12.03000
LogP	1.40
Vapour Pressure	0.1±0.5 mmHg at 25°C
Index of Refraction	1.544

CHEMICAL IDENTIFICATION

RTECS NUMBER :: NX4900000

CHEMICAL NAME :: Isoquinoline, 1,2,3,4-tetrahydro-

CAS REGISTRY NUMBER :: 91-21-4

BEILSTEIN REFERENCE NO. :: 0116156

LAST UPDATED :: 199712

DATA ITEMS CITED :: 2

MOLECULAR FORMULA :: C9-H11-N

MOLECULAR WEIGHT :: 133.21

WISWESSER LINE NOTATION :: T66 CMT&J

HEALTH HAZARD DATA

ACUTE TOXICITY DATA

TYPE OF TEST :: LDLo - Lowest published lethal dose

ROUTE OF EXPOSURE :: Subcutaneous

SPECIES OBSERVED :: Rodent - mouse

DOSE/DURATION :: 240 mg/kg

TOXIC EFFECTS :: Autonomic Nervous System - central sympatholytic

REFERENCE :: 85IXA4 "Structure et Activite Pharmacodyanmique des Medicaments du Systeme Nerveux Vegetatif," Bovet, D., and F. Bovet-Nitti, New York, S. Karger, 1948 Volume(issue)/page/year: -,244,1948

Hazard Codes	Xi:Irritant;
Risk Phrases	R36/37/38
Safety Phrases	S26-S36
WGK Germany	3
RTECS	NX4900000
HS Code	2933499090

Precursor 10
119-65-3 1532-72-5 24423-87-8 64880-92-8
54105-63-4 2859-58-7 50-00-0 64-04-0
3230-65-7 142266-67-9
DownStream 9
10579-63-2 104755-77-3 10579-62-1 110561-51-8
10579-65-4 3230-65-7 119-65-3 1196-38-9
645-49-8

HS Code	2933499090
Summary	2933499090. other compounds containing in the structure a quinoline or isoquinoline ring-system (whether or not hydrogenated), not further fused. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0%

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