Shanghai Nianxing Industrial Co., Ltd
China
Product Name: Palmitic acid
Price: Check
Purity: 98.0%
Stocking Period: 10 Day
Contact: Yang
Email: sales@echemcloud.com

Dayang Chem (Hangzhou) Co., Ltd.
China
Product Name: Acetylenedicarboxylic acid
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: Acetylenedicarboxylic acid,142-45-0
Price: $Inquiry/1kg $Inquiry/25kg $Inquiry/1000kg $Inquiry/10ton
Purity: 99.0%
Stocking Period: Inquiry
Contact: Anson
Email: info@tianfuchem.com

142-45-0

142-45-0 structure

142-45-0 structure

Name: 2-Butynedioic acid
Chemical Name: butynedioic acid
CAS Number: 142-45-0
Molecular Formula: C₄H₂O₄
Molecular Weight: 114.056
Catalog: Chemical reagent Organic reagent fatty acid
Create Date: 2018-06-18 00:14:21
Modify Date: 2026-07-08 16:41:38

Name	butynedioic acid
Synonyms	butynedioicaci 2-Butyne-1,4-dioic acid ACETYLENEDICBOXYLIC ACID Acetylenedicboxylic acid,2-Butynedioic acid BUTYNEDIOIC ACID Acetylenedicarboxylic acid but-2-ynedioic acid NSC-631597 MFCD00004362 NSC-1903 But-2-ynedioic acid Butyne acid BUTYNEDIOIC ACID ACETYLENE DICBOXYLIC ACID Acetylenedicboxylic acid, R Acetyleoledicboxylicacid 2-BUTYNEDIOIC ACID Acetylenedicboxylic Acid > 2-Butynedioate Acetylendicarboxylate EINECS 205-536-0 Acetaylenedicboxylic Acid Acetylenedicboxylic acid [-0] ACETYLENEDICBOXYLIC ACID FREE ACID Acetylen-dicbonsαure

Density	1.7±0.1 g/cm3
Boiling Point	362.4±25.0 °C at 760 mmHg
Melting Point	180-187 °C (dec.)(lit.)
Molecular Formula	C₄H₂O₄
Molecular Weight	114.056
Flash Point	187.2±19.7 °C
Exact Mass	113.995308
PSA	74.60000
LogP	0.34
Vapour Pressure	0.0±1.7 mmHg at 25°C
Index of Refraction	1.560
Storage condition	2-8°C
Water Solubility	soluble

Symbol	GHS06
Signal Word	Danger
Hazard Statements	H301-H315-H319-H335
Precautionary Statements	P261-P301 + P310-P305 + P351 + P338
Personal Protective Equipment	Eyeshields;Faceshields;Gloves;type P2 (EN 143) respirator cartridges
Hazard Codes	T:Toxic;Xi:Irritant;
Risk Phrases	R25;R36/37/38
Safety Phrases	S26-S45-S37/39
RIDADR	UN 2811 6.1/PG 3
WGK Germany	3
Packaging Group	II
Hazard Class	6.1
HS Code	29171990

Precursor 8
110-65-6 109-72-8 593-60-2 124-38-9
584-99-6 644-80-4 17096-37-6 1066-26-8
DownStream 9
10302-94-0 328-42-7 4546-95-6 471-25-0
124-38-9 74-86-2 14447-02-0 3899-96-5
142207-58-7

HS Code	2917190090
Summary	2917190090 acyclic polycarboxylic acids, their anhydrides, halides, peroxides, peroxyacids and their derivatives VAT:17.0% Tax rebate rate:9.0% Supervision conditions:none MFN tariff:6.5% General tariff:30.0%

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