Isophthalic acid

Modify Date: 2025-08-20 20:07:38

Isophthalic acid structure	Common Name	Isophthalic acid
	CAS Number	121-91-5	Molecular Weight	166.131
	Density	1.5±0.1 g/cm3	Boiling Point	412.3±28.0 °C at 760 mmHg
	Molecular Formula	C₈H₆O₄	Melting Point	341-343 °C(lit.)
	MSDS	Chinese USA	Flash Point	217.3±20.5 °C

Use of Isophthalic acid

Isophthalic acid is an intermediate for high performance unsaturated polyesters, resins for coatings, high solids paints, gel coats and modifier of polyethylene terephthalate for bottles.

Name	isophthalic acid
Synonym	More Synonyms

Density	1.5±0.1 g/cm3
Boiling Point	412.3±28.0 °C at 760 mmHg
Melting Point	341-343 °C(lit.)
Molecular Formula	C₈H₆O₄
Molecular Weight	166.131
Flash Point	217.3±20.5 °C
Exact Mass	166.026611
PSA	74.60000
LogP	1.66
Vapour Pressure	0.0±1.0 mmHg at 25°C
Index of Refraction	1.618
Stability	Stable. Incompatible with strong oxidizing agents, strong bases.
Water Solubility	0.01 g/100 mL (25 ºC)

Isophthalic acid MSDS(Chinese)

CHEMICAL IDENTIFICATION

RTECS NUMBER :: NT2007000

CHEMICAL NAME :: Isophthalic acid

CAS REGISTRY NUMBER :: 121-91-5

BEILSTEIN REFERENCE NO. :: 1909332

LAST UPDATED :: 199701

DATA ITEMS CITED :: 8

MOLECULAR FORMULA :: C8-H6-O4

MOLECULAR WEIGHT :: 166.14

WISWESSER LINE NOTATION :: QVR CVQ

HEALTH HAZARD DATA

ACUTE TOXICITY DATA

TYPE OF TEST :: Standard Draize test

ROUTE OF EXPOSURE :: Administration into the eye

SPECIES OBSERVED :: Rodent - rabbit

REFERENCE :: 85JCAE "Prehled Prumyslove Toxikologie; Organicke Latky," Marhold, J., Prague, Czechoslovakia, Avicenum, 1986 Volume(issue)/page/year: -,317,1986 ** ACUTE TOXICITY DATA **

TYPE OF TEST :: LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :: Oral

SPECIES OBSERVED :: Rodent - rat

DOSE/DURATION :: 10400 mg/kg

TOXIC EFFECTS :: Details of toxic effects not reported other than lethal dose value

REFERENCE :: 85JCAE "Prehled Prumyslove Toxikologie; Organicke Latky," Marhold, J., Prague, Czechoslovakia, Avicenum, 1986 Volume(issue)/page/year: -,317,1986

TYPE OF TEST :: LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :: Intraperitoneal

SPECIES OBSERVED :: Rodent - mouse

DOSE/DURATION :: 4200 mg/kg

TOXIC EFFECTS :: Behavioral - somnolence (general depressed activity) Behavioral - excitement Nutritional and Gross Metabolic - body temperature decrease

REFERENCE :: COREAF Comptes Rendus Hebdomadaires des Seances, Academie des Sciences. (Paris, France) V.1-261, 1835-1965. For publisher information, see CRASEV. Volume(issue)/page/year: 246,851,1958 *** REVIEWS *** TOXICOLOGY REVIEW BPCT** Progress Report from the Environmental Protection Agency to NIOSH on Benzenepolycarboxylates, 1974 Volume(issue)/page/year: -,183,1974 *** OCCUPATIONAL EXPOSURE LIMITS *** OEL-RUSSIA:STEL 0.2 mg/m3;Skin JAN 1993 *** NIOSH STANDARDS DEVELOPMENT AND SURVEILLANCE DATA *** NIOSH OCCUPATIONAL EXPOSURE SURVEY DATA : NOHS - National Occupational Hazard Survey (1974) NOHS Hazard Code - 82897 No. of Facilities: 3665 (estimated) No. of Industries: 67 No. of Occupations: 68 No. of Employees: 55161 (estimated) NOES - National Occupational Exposure Survey (1983) NOES Hazard Code - 82897 No. of Facilities: 8709 (estimated) No. of Industries: 59 No. of Occupations: 49 No. of Employees: 117411 (estimated) No. of Female Employees: 17858 (estimated)

Personal Protective Equipment	Eyeshields;Gloves;type N95 (US);type P1 (EN143) respirator filter
Hazard Codes	Xi:Irritant
Risk Phrases	R36/37/38
Safety Phrases	S24/25-S36-S26
RIDADR	NONH for all modes of transport
WGK Germany	2
RTECS	NT2007000
HS Code	29173980

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HS Code	2917391000
Summary	2917391000 isophthalic acid。Supervision conditions:None。VAT:17.0%。Tax rebate rate:9.0%。Lowest tariff:6.5%。General tariff:30.0%

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5-CARBOXAMINODOTRYPTAMINE

5-CARBOXAMIDOTRYPTAMINE HEMIETHANOLATE MALEATE SALT

Isophthalic acid

iso-phthalic acid

benzene-1,3-dicarboxylic acid

MFCD00002516

1,3-Benzenedicarboxylic acid

EINECS 204-506-4

5-carboxamidotrypamine

5-Carboxamidotryptamine

2-Carboxyamidotryptamine

5-carboxybenzoic acid

isophthalic_acid

5-CT

5-Carboxamide tryptamine

isophtalic acid

5-Carboxyamidotryptamine

1,3-benzene dicarboxylic acid

m-phthalic acid

Benzen-1,3-Dicarboxylic acid

hydrogen isophthalate

5-CAT

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Shanghai Nianxing Industrial Co., Ltd
China
Product Name: Isophthalic acid
Price: Check
Purity: 99.5%
Delivery: 10 Day
Contact: Yang
Email: sales@echemcloud.com

BioBioPha
China
Product Name: Isophthalic acid
Price: ￥Inquiry/5mg
Purity: 98.0%
Delivery: 10 Day
Contact: Xueping-Zheng
Email: 1477035482@qq.com

Shanghai Jizhi Biochemical Technology Co., Ltd
China
Product Name: Isophthalic acid
Price: ￥78.0/500g
Purity: 98.0%
Delivery: Inquiry
Contact: Liu jia
Email: 2130147988@qq.com

ShangHai DC Chemicals Co.,Ltd
China
Product Name: Isophthalic acid
Price: ￥Inquiry/1g
Purity: 98.9%
Delivery: 1 Day
Contact: Tony Lai
Email: order@dcchemicals.com

DC Chemicals Limited
China
Product Name: Isophthalic acid
Price: $Inquiry/100mg $Inquiry/250mg $Inquiry/500mg
Purity: 98.0%
Delivery: 3 Day
Contact: Tony Cao
Email: sales@dcchemicals.com

Dayang Chem (Hangzhou) Co., Ltd.
China
Product Name: Isophthalic acid
Price: $Inquiry/100g $Inquiry/1kg $Inquiry/100kg $Inquiry/1000kg
Purity: 98.0%
Delivery: Inquiry
Contact: Ms Wang
Email: enquiry@dycnchem.com

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Price: ￥108/500g

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Isophthalic acid

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