صيغة

C00H - C₆H₄ - C00H

الوصف

A white crystalline powder with a slight acidic odor. It is mildly irritating to the eyes, skin and respiratory tract.

الخصائص

Parameter	Unit	Quantity
Molecular weight	g/mol	166.13
Melting point	°C	sublimes at 402°C
Vapor density	at 20°C (air = 1.0)	5.74
Vapor pressure	at 20°C	< 0.00013
pH	1% dilution	2.16
CAS number	100-21-0
IUPAC name	Terephthalic acid

المواصفات

Parameter	Unit	Quantity	Test Method
Acidity	mg of KOH/gm	675 ± 2	MA-863
Moisture	wt %	0.2 max.	MA-1015
Ash	ppm	7 max.	MA-696
4-Carboxybenzaldehyde	ppm	25 max.	MA-1262
Color	APHA (in N-N-Dimethyl From Amide Solution), HU	10 max.	MA-998
Iron	ppm	0.5 max.	MA-1256
Para Toluic Acid	ppm	150 max.	MA-667
Total metals Fe, Mn, Co, Cr, Ni, Mo, Ti	ppm	2 max.	MA-1302
Δ Y		10 max.	MA-60

المخاطر والسلامة

The material is moderately discomforting to the gastrointestinal tract and may be harmful if swallowed in large quantity.

Parameter	Unit	Quantity
Flash point	°C	260
Ignition point	°C	496

التطبيقات

PTA is mainly used in the production of polyester products, including polyethylene terphthalate (PET), follows reaction with glycol, reagent for alkali in wool and an additive to poultry feeds.

التخزين والمناولة

Multi ply paper bag with sealed plastic liner or heavy gauge plastic bag. Check that all containers are clearly labeled and free from leaks.

- Big-bags of 1000kg (20MT per 20ft container).
- Big-bags of 1100kg (22MT per 20ft container).
- Bulk container (up to 25MT per 20ft container).